CN208459675U - A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems - Google Patents
A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems Download PDFInfo
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- CN208459675U CN208459675U CN201820855050.1U CN201820855050U CN208459675U CN 208459675 U CN208459675 U CN 208459675U CN 201820855050 U CN201820855050 U CN 201820855050U CN 208459675 U CN208459675 U CN 208459675U
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Abstract
The utility model relates to infrared optical system fields, and in particular to a kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems.Including the primary optic axis and the second optical axis being parallel to each other, it is sequentially coaxially equipped with secondary mirror, the first negative meniscus, the first falcate positive lens and principal reflection mirror on primary optic axis, the second falcate positive lens, double-concave negative lens, biconvex positive lens, the second negative meniscus and third falcate positive lens are sequentially coaxially equipped on the second optical axis；In the reflection microscope group that principal reflection mirror is equipped with third optical axis towards the side of image space and will reflect from the light of the first falcate positive lens or from the light direction of third falcate positive lens along third optical axis direction.The utility model has the advantages that long-focus, heavy caliber, more view field imagings, can increase system to the detection of target, identification distance, while improving the sensitivity to the light gathering and system of light.
Description
Technical field
The utility model relates to infrared optical system fields, and in particular to a kind of long-focus, heavy caliber, more visual field medium waves are red
Outer optical system.
Background technique
Infrared optical system has that night penetration capacity is strong, identification camouflage ability is strong, can passively receive infra-red radiation, hidden
Covering property is good, is not easy the advantages that being disturbed, and presents brilliant performance at military, civilian aspect.Under normal circumstances, short focus light
System visual field is wider, but its spatial resolution is low；Long-focal distance optical system visual field is relatively narrow, but has high spatial resolution.
In the course of work in the fields such as military surveillance, earth observation, according to the requirement of task, target should be scanned for, again
Target is aimed at, this just needs optical system to have the search of big visual field and the aiming of higher spatial resolution simultaneously.Cause
This has long short focus using one, the zoom system, pancreatic system of big small field of view free switching can be completed at the same time to target search and take aim at
Quasi- task.
Continuous vari-focus system, which has, not only may search for the target in big field range but also can aim within the scope of small field of view
The advantages of target, therefore infrared continuous vari-focus system is widely used in military fields such as land, sea, air.In order to make with
The range that track searches for target is bigger so that the more more detailed useful informations of acquisition, must just improve the zoom ratio of system, therefore
Researching and designing with high zoom ratio, compact-sized, complexity is low, light-weight big zoom ratio infrared optical system have it is important
Meaning.
The advantages of continuous zooming optical system is that target image can remain clearly in zooming procedure, can be realized change
The transformation of any visual field in burnt range.It applies in photoelectric tracking sighting system, system will not lose during continuous vari-focus
Track target.But continuous vari-focus system structure is complicated, resetting difficulty is big, and zooming procedure mid-focal length precision and light axis consistency are all
It is difficult to guarantee.In addition, visual field transformation period is also an important indicator during visual field switching or consecutive variations, because continuous become
Burnt zooming time is long, currently about 6s.However, situation of battlefield is fast changing, opportunity of combat is transient, visual field switching time is too long
It can bungle the chance of winning a battle.Therefore, continuous vari-focus also has it disadvantageously.
Utility model content
The utility model is intended to provide a kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems, to increase system
Detection, identification distance to target, while improving the sensitivity to the light gathering and system of light.
In order to solve the above technical problems, the technical solution adopted in the utility model are as follows: a kind of long-focus, heavy caliber, more
Visual field medium-wave infrared optical system, primary optic axis and the second optical axis including the distribution that is parallel to each other, along by object on primary optic axis
It is anti-that side to the direction of image space is sequentially coaxially equipped with secondary mirror, the first negative meniscus, the first falcate positive lens and master
Penetrate mirror, on the second optical axis along by the direction of object space to image space be sequentially coaxially equipped with the second falcate positive lens, double-concave negative lens,
Biconvex positive lens, the second negative meniscus and third falcate positive lens；The mirror surface of principal reflection mirror is set towards object space direction
It sets, the centre bore propagated from the first falcate positive lens to image space direction for light is offered on principal reflection mirror and for light
The mirror surface on the side hole propagated from third falcate positive lens to image space direction, secondary mirror is arranged towards image space direction, and is used for
Light from principal reflection mirror is reflected towards the first negative meniscus, double-concave negative lens and the second negative meniscus are solid
Connection, which is arranged, simultaneously forms zoom microscope group, and for driving zoom microscope group to move axially along the second optical axis is arranged in zoom microscope group
In one switching executing agency；In principal reflection mirror towards the side of image space equipped with the third light perpendicular to primary optic axis and the second optical axis
Axis and for by from the light of the first falcate positive lens or from third falcate positive lens light towards edge
Third optical axis direction reflection reflection microscope group, on third optical axis sequentially coaxially be equipped with imaging surface, third negative meniscus with
And the 4th falcate positive lens, reflection microscope group include third plane mirror, for will be from the first falcate positive lens
The first plane mirror that light is reflected towards third plane mirror, for will be from the light of third falcate positive lens
The second plane mirror that is reflected towards third plane mirror and for will be from the light court of third plane mirror
The fourth plane reflecting mirror reflected to the 4th falcate positive lens direction, second plane mirror setting therein is in the second switching
In executing agency, the second switching executing agency is used to second plane mirror cutting the first plane mirror and third plane is anti-
It penetrates between mirror to stop the light directive third plane mirror from the first falcate positive lens and make curved from third
The light directive third plane mirror of month shape positive lens, or second plane mirror is cut out into the first plane mirror and third
Between plane mirror with cut off from third falcate positive lens light directive third plane mirror and make from
The light directive third plane mirror of first falcate positive lens.
Preferably, the first plane mirror and third plane mirror are arranged in parallel, and fourth plane reflecting mirror is vertical
It is arranged in the first plane mirror and third plane mirror.
Preferably, the effective focal length f of secondary mirror1Satisfaction -1.6f≤f1≤-1.4f；First negative meniscus it is effective
Focal length f2Satisfaction -3.2f≤f2≤-2.8f；The effective focal length f of first falcate positive lens3Meet 4.0f≤f3≤4.5f；It is main anti-
Penetrate the effective focal length f of mirror4Satisfaction -4.37f≤f4≤-4.25f；The effective focal length f of second falcate positive lens7Meet 2.3f≤
f7≤2.4f；The effective focal length f of double-concave negative lens8Satisfaction -0.5f≤f8≤-0.47f；The effective focal length f of biconvex positive lens9It is full
Sufficient 0.9f≤f9≤1.0f；The effective focal length f of second negative meniscus10Satisfaction -2.8f≤f10≤-2.5f；Third falcate
The effective focal length f of positive lens11Meet 4.4f≤f11≤5.1f；The effective focal length f of 4th falcate positive lens14Meet 0.35f≤
f14≤0.4f；The effective focal length f of third negative meniscus15Satisfaction -0.65f≤f15≤ -0.6f, f therein are that medium wave is red
Focal length when outer optical system short focus.
Preferably, the first falcate positive lens, double-concave negative lens, biconvex positive lens and third negative meniscus direction
The surface of image space side is even aspheric surface；The surface of first falcate positive lens towards image space side meets face type equation:
,
It is thereinc 1It is the first falcate positive lens towards the curvature of one side surface of image space,r 1For hanging down for the first falcate positive lens
Directly in the radial coordinate of optical axis direction,k 1It is the first falcate positive lens towards the conic constant of one side surface of image space,A 1For
First falcate positive lens towards one side surface of image space quadravalence asphericity coefficient,B 1It is the first falcate positive lens towards image space
Six rank asphericity coefficients of one side surface,C 1It is the first falcate positive lens towards the aspherical system of eight ranks of one side surface of image space
Number,D 1It is the first falcate positive lens towards ten rank asphericity coefficients of one side surface of image space；Double-concave negative lens are towards image space one
The surface of side meets face type equation:
,
It is thereinc 2It is double-concave negative lens towards the curvature of one side surface of image space,r 2It is double-concave negative lens perpendicular to optical axis direction
Radial coordinate,k 2It is double-concave negative lens towards the conic constant of one side surface of image space,A 2It is double-concave negative lens towards image space
The quadravalence asphericity coefficient of one side surface,B 2It is double-concave negative lens towards six rank asphericity coefficients of one side surface of image space,C 2It is double
Recessed negative lens towards one side surface of image space eight rank asphericity coefficients,D 2It is double-concave negative lens towards ten ranks of one side surface of image space
Asphericity coefficient；The surface of biconvex positive lens towards image space side meets face type equation:
,
It is thereinc 3It is biconvex positive lens towards the curvature of one side surface of image space,r 3It is biconvex positive lens perpendicular to optical axis direction
Radial coordinate,k 3It is biconvex positive lens towards the conic constant of one side surface of image space,A 3It is biconvex positive lens towards image space
The quadravalence asphericity coefficient of one side surface,B 3It is biconvex positive lens towards six rank asphericity coefficients of one side surface of image space,C 3It is double
Convex positive lens towards one side surface of image space eight rank asphericity coefficients,D 3It is biconvex positive lens towards ten ranks of one side surface of image space
Asphericity coefficient；The surface of third negative meniscus towards image space side meets face type equation:
,
It is thereinc 4It is third negative meniscus towards the curvature of one side surface of image space,r 4For hanging down for third negative meniscus
Directly in the radial coordinate of optical axis direction,k 4It is third negative meniscus towards the conic constant of one side surface of image space,A 4For
Third negative meniscus towards one side surface of image space quadravalence asphericity coefficient,B 4It is third negative meniscus towards image space
Six rank asphericity coefficients of one side surface,C 4It is third negative meniscus towards the aspherical system of eight ranks of one side surface of image space
Number,D 4It is third negative meniscus towards ten rank asphericity coefficients of one side surface of image space.
Beneficial effect
1. the utility model realizes narrow visual field and other three visual fields by switching in and out for second plane mirror
Switching, second plane mirror forms refraction-reflection type system after cutting out, realizes long coking, improve detection to target, know
Other ability is suitable for high-altitude distant reconnaissance.It solves since high quality, bigbore infra-red material are difficult melting,
Transmission-type infrared optical system is difficult to realize long-focus, bigbore technical problem.
2. connect firmly setting by double-concave negative lens and the second negative meniscus, done on the second optical axis equidistant, constant speed,
Front and back linkage in the same direction, to realize short focus, secondary short focus and secondary focal length focal length variations.Structure is simply easy to manufacture, to control system
Required precision it is lower, the precision-fit for overcoming mechanical compensation system to need complicated cam structure or double lead-screw just can guarantee change
Image keeps clear disadvantage during coke.
3. secondary imaging system is used, it is Polaroid between third plane mirror and fourth plane reflecting mirror, two
Secondary imaging is located on imaging surface, and the stray light outside system visual field cannot pass through field stop and reach image planes, can effectively reduce spuious
Influence of the light to optical system imaging, improves signal-to-noise ratio.System realizes cold stop efficiency 100%, not will cause light beam cutting,
Therefore, reduce energy loss, improve system sensitivity.
Detailed description of the invention
Fig. 1 is the index path that the utility model is in (focal length 1000mm) under focal length image formation state；
Fig. 2 is the left view of principal reflection mirror in Fig. 1；
Fig. 3 is the index path that the utility model is in (focal length 200mm) under time focal length image formation state；
Fig. 4 is the index path that the utility model is in (focal length 120mm) under time short focus image formation state；
Fig. 5 is the index path that the utility model is in (focal length 40mm) under short focus image formation state；
Fig. 6 is the transmission function figure that the utility model is in (focal length 1000mm) under focal length image formation state；
Fig. 7 is the transmission function figure that the utility model is in (focal length 200mm) under time focal length image formation state；
Fig. 8 is the transmission function figure that the utility model is in (focal length 120mm) under time short focus image formation state；
Fig. 9 is the transmission function figure that the utility model is in (focal length 40mm) under short focus image formation state；
Figure 10 is the point range figure that the utility model is in (focal length 1000mm) under focal length image formation state；
Figure 11 is the point range figure that the utility model is in (focal length 200mm) under time focal length image formation state；
Figure 12 is the point range figure that the utility model is in (focal length 120mm) under time short focus image formation state；
Figure 13 is the point range figure that the utility model is in (focal length 40mm) under short focus image formation state；
Figure 14 is the curvature of field, the distortion figure that the utility model is in (focal length 1000mm) under focal length image formation state；
Figure 15 is the curvature of field, the distortion figure that the utility model is in (focal length 200mm) under time focal length image formation state；
Figure 16 is the curvature of field, the distortion figure that the utility model is in (focal length 120mm) under time short focus image formation state；
Figure 17 is the curvature of field, the distortion figure that the utility model is in (focal length 40mm) under short focus image formation state；
Marked in the figure: 1, secondary mirror, the 2, first negative meniscus, the 3, first falcate positive lens, 4, principal reflection mirror,
401, centre bore, 402, side hole, the 5, first plane mirror, 6, second plane mirror, the 7, second falcate positive lens, 8, double
Recessed negative lens, 9, biconvex positive lens, the 10, second negative meniscus, 11, third falcate positive lens, 12, third plane reflection
Mirror, 13, fourth plane reflecting mirror, the 14, the 4th falcate positive lens, 15, third negative meniscus, 16, imaging surface.
Specific embodiment
As shown in Fig. 1 to Figure 17, a kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems of the utility model,
Primary optic axis and the second optical axis including the distribution that is parallel to each other, on primary optic axis sequentially coaxially along the direction by object space to image space
Equipped with secondary mirror 1, the first negative meniscus 2, the first falcate positive lens 3 and principal reflection mirror 4, the edge on the second optical axis
Second falcate positive lens 7, double-concave negative lens 8, biconvex positive lens 9, second are sequentially coaxially equipped with by the direction of object space to image space
Negative meniscus 10 and third falcate positive lens 11.
The mirror surface of principal reflection mirror 4 towards object space direction be arranged, in the focal length imaging pattern of the utility model by object
The natural light just reflected reflexes in secondary mirror 1, then passes sequentially through and be arranged in the first light after being reflected light by secondary mirror 1
Multiple lens on axis.It is offered on principal reflection mirror 4 for light from the first falcate positive lens 3 into the propagation of image space direction
Heart hole 401 and the side hole 402 propagated for light from third falcate positive lens 11 to image space direction.The mirror surface of secondary mirror 1
It is arranged towards image space direction, and for reflecting the light from principal reflection mirror 4 towards the first negative meniscus 2.Concave-concave
Negative lens 8 and the second negative meniscus 10 connect firmly setting and form zoom microscope group, and the setting of zoom microscope group is at one for driving
Zoom microscope group is in the first switching executing agency that the second optical axis moves axially.The recessed negative lens of double-concave negative lens 8 and the second bent moon
Shape negative lens 10 connects firmly setting, does equidistant, constant speed, front and back linkage in the same direction, on the second optical axis to realize the utility model
Switching between middle remaining three visual field, that is, short focus, secondary short focus and secondary focal length imaging pattern.In short focus, zoom microscope group is close
The position of object space；In secondary short focus, zoom microscope group is located at the position among object space and image space, is that zoom microscope group exists in secondary focal length
Close to the position of image space.
In principal reflection mirror 4 towards the side of image space equipped with the third optical axis and use perpendicular to primary optic axis and the second optical axis
In by from the light of the first falcate positive lens 3 or from third falcate positive lens 11 light towards along third light
The reflection microscope group of axis direction reflection.
It is just saturating that imaging surface 16, third negative meniscus 15 and the 4th falcate are sequentially coaxially equipped on third optical axis
Mirror 14.
Reflection microscope group includes third plane mirror 12, for will be from the light direction of the first falcate positive lens 3
The first plane mirror 5 that third plane mirror 12 reflects, for will be from the light court of third falcate positive lens 11
The second plane mirror 6 that is reflected to third plane mirror 12 and for will be from the light of third plane mirror 12
Towards the fourth plane reflecting mirror 13 of 14 direction of the 4th falcate positive lens reflection, the setting of second plane mirror 6 therein exists
In second switching executing agency, the second switching executing agency is used to second plane mirror 6 cutting 5 He of the first plane mirror
Between third plane mirror 12 with stop from the first falcate positive lens 3 light directive third plane mirror 12 simultaneously
Make the light directive third plane mirror 12 from third falcate positive lens 11, or second plane mirror 6 is cut out
The light directive from third falcate positive lens 11 is cut off between first plane mirror 5 and third plane mirror 12
Third plane mirror 12 simultaneously makes light directive third plane mirror 12 from the first falcate positive lens 3, and first is flat
Face reflecting mirror 5, second plane mirror 6, third plane mirror 12 and fourth plane reflecting mirror 13 favour primary optic axis
Setting, the first plane mirror 5 and third plane mirror 12 are arranged in parallel, and fourth plane reflecting mirror 13 is perpendicular to first
Plane mirror 5 and third plane mirror 12 are arranged.
The first plane mirror 5 is cut or cut out by second plane mirror 6 in the utility model and the second plane is anti-
The optical path penetrated between mirror 6 realizes the focal length imaging and the switchings of other three visual fields of narrow field.When second plane mirror 6 is cut out
After optical path, the second falcate positive lens 7, double-concave negative lens 8, biconvex positive lens 9, the second negative meniscus 10, third bent moon
Shape positive lens 11 is not involved in imaging, and principal reflection mirror 4, secondary mirror 1 and the first negative meniscus 2, the first falcate are just saturating
Mirror 3, the first plane mirror 5, third plane mirror 12, fourth plane reflecting mirror 13, the 4th falcate positive lens 14, third
Negative meniscus 15 forms catadioptric system, realizes heavy caliber, long coking infrared optical system；When second plane mirror 6
After cutting optical path, secondary mirror 1, the first negative meniscus 2, the first falcate positive lens 3, principal reflection mirror 4, the first plane are anti-
It penetrates mirror 5 and is not involved in imaging, the second falcate positive lens 7, double-concave negative lens 8, biconvex positive lens 9, the second negative meniscus
10, third falcate positive lens 11, second plane mirror 6, third plane mirror 12, fourth plane reflecting mirror the 13, the 4th
Falcate positive lens 14, third negative meniscus 15 form transmissive system and realize its excess-three view field imaging.
In specific optic path, after second plane mirror 6 cuts out optical path, issued by object plane reflection natural light
Light through principal reflection mirror 4 reflection after reach secondary mirror 1, through secondary mirror 1 reflection after reach the first negative meniscus 2,
The first falcate positive lens 3 is reached after the diverging of the first negative meniscus 2, is reached after the convergence of the first falcate positive lens 3
First plane mirror 5 reaches third plane mirror 12 after the reflection of the first plane mirror 5, anti-by third plane
It penetrates after mirror 12 reflects and reaches fourth plane reflecting mirror 13, it is just saturating to reach the 4th falcate after the reflection of fourth plane reflecting mirror 13
Mirror 14 reaches third negative meniscus 15 after the convergence of the 4th falcate positive lens 14, by third negative meniscus
Imaging surface 16 is imaged on after 15 divergings.
After second plane mirror 6 cuts optical path, the light issued by object plane reflection natural light is through the second falcate
Positive lens 7 reaches double-concave negative lens 8 after assembling, and reaches biconvex positive lens 9 after the diverging of double-concave negative lens 8, just by biconvex
Lens 9 reach the second negative meniscus 10 after assembling, and reach third falcate after the diverging of the second negative meniscus 10
Positive lens 11 reaches second plane mirror 6 after the convergence of third falcate positive lens 11, by second plane mirror 6
Third plane mirror 12 is reached after reflection, and fourth plane reflecting mirror 13, warp are reached after the reflection of third plane mirror 12
It crosses after fourth plane reflecting mirror 13 reflects and reaches the 4th falcate positive lens 14, arrived after the convergence of the 4th falcate positive lens 14
Up to third negative meniscus 15, imaging surface 16 is imaged on after the diverging of third negative meniscus 15.
The effective focal length f of secondary mirror 11Meet -1.6 f≤f1≤-1.4f；The effective focal length of first negative meniscus 2
f2Satisfaction -3.2f≤f2≤-2.8f；The effective focal length f of first falcate positive lens 33Meet 4.0f≤f3≤4.5f；Principal reflection
The effective focal length f of mirror 44Satisfaction -4.37f≤f4≤-4.25f；The effective focal length f of second falcate positive lens 77Meet 2.3f≤
f7≤2.4f；The effective focal length f of double-concave negative lens 88Satisfaction -0.5f≤f8≤-0.47f；The effective focal length f of biconvex positive lens 99
Meet 0.9f≤f9≤1.0f；The effective focal length f of second negative meniscus 1010Satisfaction -2.8f≤f10≤-2.5f；Third is curved
The effective focal length f of month shape positive lens 1111Meet 4.4f≤f11≤5.1f；The effective focal length f of 4th falcate positive lens 1414It is full
Sufficient 0.35f≤f14≤0.4f；The effective focal length f of third negative meniscus 1515Satisfaction -0.65f≤f15≤ -0.6f, it is therein
Focal length when f is medium-wave infrared optical system short focus.
First falcate positive lens 3, double-concave negative lens 8, biconvex positive lens 9 and third negative meniscus 15 are towards picture
The surface of square side is even aspheric surface.
The surface of first falcate positive lens 3 towards image space side meets face type equation:
,
It is thereinc 1It is the first falcate positive lens 3 towards the curvature of one side surface of image space,r 1For the first falcate positive lens 3
Perpendicular to the radial coordinate of optical axis direction,k 1It is the first falcate positive lens 3 towards the conic constant of one side surface of image space,A 1It is the first falcate positive lens 3 towards the quadravalence asphericity coefficient of one side surface of image space,B 1For 3 court of the first falcate positive lens
To six rank asphericity coefficients of one side surface of image space,C 1Eight ranks for the first falcate positive lens 3 towards one side surface of image space are non-
Asphere coefficient,D 1It is the first falcate positive lens 3 towards ten rank asphericity coefficients of one side surface of image space.
The surface of double-concave negative lens 8 towards image space side meets face type equation:
,
It is thereinc 2It is double-concave negative lens 8 towards the curvature of one side surface of image space,r 2It is double-concave negative lens 8 perpendicular to optical axis side
To radial coordinate,k 2It is double-concave negative lens 8 towards the conic constant of one side surface of image space,A 2For 8 direction of double-concave negative lens
The quadravalence asphericity coefficient of one side surface of image space,B 2It is double-concave negative lens 8 towards six rank asphericity coefficients of one side surface of image space,C 2It is double-concave negative lens 8 towards eight rank asphericity coefficients of one side surface of image space,D 2It is double-concave negative lens 8 towards image space side table
The ten rank asphericity coefficients in face.
The surface of biconvex positive lens 9 towards image space side meets face type equation:
,
It is thereinc 3It is biconvex positive lens 9 towards the curvature of one side surface of image space,r 3It is biconvex positive lens 9 perpendicular to optical axis side
To radial coordinate,k 3It is biconvex positive lens 9 towards the conic constant of one side surface of image space,A 3For 9 direction of biconvex positive lens
The quadravalence asphericity coefficient of one side surface of image space,B 3It is biconvex positive lens 9 towards six rank asphericity coefficients of one side surface of image space,C 3It is biconvex positive lens 9 towards eight rank asphericity coefficients of one side surface of image space,D 3It is biconvex positive lens 9 towards image space side table
The ten rank asphericity coefficients in face.
The surface of third negative meniscus 15 towards image space side meets face type equation:
,
It is thereinc 4It is third negative meniscus 15 towards the curvature of one side surface of image space,r 4For third negative meniscus 15
The radial coordinate perpendicular to optical axis direction,k 4Conic section for third negative meniscus 15 towards one side surface of image space is normal
Number,A 4It is third negative meniscus 15 towards the quadravalence asphericity coefficient of one side surface of image space,B 4For third negative meniscus
15 towards one side surface of image space six rank asphericity coefficients,C 4It is third negative meniscus 15 towards the eight of one side surface of image space
Rank asphericity coefficient,D 4It is third negative meniscus 15 towards ten rank asphericity coefficients of one side surface of image space.
In the present embodiment, the technical indicator of optical system realization are as follows: wave band: 3.7 μm~4.8 μm；Relative aperture: 1:
4.0；Visual field: 0.68 °/3.52 °/5.86 °/17.5 °；Focal length: 1000mm/200mm/120mm/40mm, the ratio of obstruction :≤0.3.
Table 1 lists the detailed data of optical system according to the present utility model embodiment when focal length is 1000mm, packet
Face type, radius of curvature, thickness, bore, material containing each lens.Wherein, the radius of curvature of lens, thickness, bore unit be mm.
Table 2 list optical system according to the present utility model focal length be 200mm/120mm/40mm when embodiment it is detailed
Data, it includes face type, radius of curvature, thickness, bore, the materials of each lens.Wherein, the radius of curvature of lens, thickness, bore
Unit be mm.
Table 3 list according to the first falcate positive lens 3, double-concave negative lens 8, biconvex positive lens 9 in the utility model with
And each aspherical coefficient value of third negative meniscus 15.
The long-focus of the utility model, heavy caliber, more visual field medium-wave infrared optical systems view field imaging switching method, including it is short
Coke imaging switching, secondary short focus imaging switching, secondary focal length imaging switching and focal length imaging switching；
The method of short focus imaging switching are as follows: secondary second plane mirror 6 is cut into the first plane mirror 5 and third plane
Between reflecting mirror 12, by zoom microscope group moving axially to close to the position of object space along the second optical axis；
The method of secondary short focus imaging switching are as follows: secondary second plane mirror 6 is cut into the first plane mirror 5 and third is put down
Between face reflecting mirror 12, by zoom microscope group along the position of the second optical axis moved axially between object space and image space；
The method of secondary focal length imaging switching are as follows: secondary second plane mirror 6 is cut into the first plane mirror 5 and third is put down
Between face reflecting mirror 12, by zoom microscope group moving axially to close to the position of image space along the second optical axis；
The method of focal length imaging switching are as follows: secondary second plane mirror 6 is cut out into the first plane mirror 5 and third plane
Between reflecting mirror 12, by zoom microscope group moving axially to close to the position of image space along the second optical axis.
Claims (4)
1. a kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems, it is characterised in that: including the distribution that is parallel to each other
Primary optic axis and the second optical axis are sequentially coaxially equipped with secondary mirror (1), the along by the direction of object space to image space on primary optic axis
One negative meniscus (2), the first falcate positive lens (3) and principal reflection mirror (4), along by object space to picture on the second optical axis
The direction of side is sequentially coaxially equipped with the second falcate positive lens (7), double-concave negative lens (8), biconvex positive lens (9), the second bent moon
Shape negative lens (10) and third falcate positive lens (11)；The mirror surface of principal reflection mirror (4) is arranged towards object space direction, main anti-
It penetrates and offers the centre bore (401) propagated from the first falcate positive lens (3) to image space direction for light on mirror (4) and for light
The side hole (402) that line is propagated from third falcate positive lens (11) to image space direction, the mirror surface of secondary mirror (1) is towards image space side
To setting, and for that will be reflected from the light of principal reflection mirror (4) towards the first negative meniscus (2), double-concave negative lens
(8) it connects firmly setting with the second negative meniscus (10) and forms zoom microscope group, the setting of zoom microscope group becomes at one for driving
Burnt microscope group is in the first switching executing agency that the second optical axis moves axially；It is equipped in the side of principal reflection mirror (4) towards image space
Third optical axis perpendicular to primary optic axis and the second optical axis and for will from the first falcate positive lens (3) light or
Light from third falcate positive lens (11) is towards the reflection microscope group along the reflection of third optical axis direction, on third optical axis
It is sequentially coaxially equipped with imaging surface (16), third negative meniscus (15) and the 4th falcate positive lens (14), reflects microscope group
Including third plane mirror (12), for will from the first falcate positive lens (3) light towards third plane reflection
The first plane mirror (5) of mirror (12) reflection, for will from third falcate positive lens (11) light towards third
The second plane mirror (6) of plane mirror (12) reflection and for will be from the light of third plane mirror (12)
Towards the fourth plane reflecting mirror (13) of the 4th falcate positive lens (14) direction reflection, second plane mirror (6) therein
In the second switching executing agency, the second switching executing agency is used to second plane mirror (6) cutting the first plane for setting
Stop the light directive the from the first falcate positive lens (3) between reflecting mirror (5) and third plane mirror (12)
Three plane mirrors (12) simultaneously make light directive third plane mirror (12) from third falcate positive lens (11), or
By second plane mirror (6) cut out between the first plane mirror (5) and third plane mirror (12) with cutting from
The light directive third plane mirror (12) of third falcate positive lens (11) simultaneously makes from the first falcate positive lens (3)
Light directive third plane mirror (12).
2. a kind of long-focus according to claim 1, heavy caliber, more visual field medium-wave infrared optical systems, it is characterised in that:
First plane mirror (5) and third plane mirror (12) are arranged in parallel, and fourth plane reflecting mirror (13) is perpendicular to
One plane mirror (5) and third plane mirror (12) setting.
3. a kind of long-focus according to claim 1, heavy caliber, more visual field medium-wave infrared optical systems, it is characterised in that:
The effective focal length f of secondary mirror (1)1Satisfaction -1.6f≤f1≤-1.4f；The effective focal length f of first negative meniscus (2)2It is full
Foot -3.2f≤f2≤-2.8f；The effective focal length f of first falcate positive lens (3)3Meet 4.0f≤f3≤4.5f；Principal reflection mirror
(4) effective focal length f4Satisfaction -4.37f≤f4≤-4.25f；The effective focal length f of second falcate positive lens (7)7Meet 2.3f
≤f7≤2.4f；The effective focal length f of double-concave negative lens (8)8Satisfaction -0.5f≤f8≤-0.47f；Biconvex positive lens (9) it is effective
Focal length f9Meet 0.9f≤f9≤1.0f；The effective focal length f of second negative meniscus (10)10Satisfaction -2.8f≤f10≤-
2.5f；The effective focal length f of third falcate positive lens (11)11Meet 4.4f≤f11≤5.1f；4th falcate positive lens (14)
Effective focal length f14Meet 0.35f≤f14≤0.4f；The effective focal length f of third negative meniscus (15)15Satisfaction -0.65f≤
f15Focal length when≤- 0.6f, f therein are medium-wave infrared optical system short focus.
4. a kind of long-focus according to claim 1, heavy caliber, more visual field medium-wave infrared optical systems, it is characterised in that:
First falcate positive lens (3), double-concave negative lens (8), biconvex positive lens (9) and third negative meniscus (15) are towards picture
The surface of square side is even aspheric surface；The surface of first falcate positive lens (3) towards image space side meets face type equation:
,
It is thereinc 1It is the first falcate positive lens (3) towards the curvature of one side surface of image space,r 1For the first falcate positive lens
(3) the radial coordinate perpendicular to optical axis direction,k 1It is the first falcate positive lens (3) towards the secondary song of one side surface of image space
Line constant,A 1It is the first falcate positive lens (3) towards the quadravalence asphericity coefficient of one side surface of image space,B 1For the first falcate
Positive lens (3) towards one side surface of image space six rank asphericity coefficients,C 1It is the first falcate positive lens (3) towards image space side
The eight rank asphericity coefficients on surface,D 1It is the first falcate positive lens (3) towards ten rank asphericity coefficients of one side surface of image space；
The surface of double-concave negative lens (8) towards image space side meets face type equation:
,
It is thereinc 2It is double-concave negative lens (8) towards the curvature of one side surface of image space,r 2It is double-concave negative lens (8) perpendicular to light
The radial coordinate of axis direction,k 2It is double-concave negative lens (8) towards the conic constant of one side surface of image space,A 2It is negative saturating for concave-concave
Mirror (8) towards one side surface of image space quadravalence asphericity coefficient,B 2It is double-concave negative lens (8) towards six ranks of one side surface of image space
Asphericity coefficient,C 2It is double-concave negative lens (8) towards eight rank asphericity coefficients of one side surface of image space,D 2For double-concave negative lens (8)
Towards ten rank asphericity coefficients of one side surface of image space；The surface of biconvex positive lens (9) towards image space side meets face type equation:
,
It is thereinc 3It is biconvex positive lens (9) towards the curvature of one side surface of image space,r 3It is biconvex positive lens (9) perpendicular to light
The radial coordinate of axis direction,k 3It is biconvex positive lens (9) towards the conic constant of one side surface of image space,A 3It is just saturating for biconvex
Mirror (9) towards one side surface of image space quadravalence asphericity coefficient,B 3It is biconvex positive lens (9) towards six ranks of one side surface of image space
Asphericity coefficient,C 3It is biconvex positive lens (9) towards eight rank asphericity coefficients of one side surface of image space,D 3For biconvex positive lens (9)
Towards ten rank asphericity coefficients of one side surface of image space；The surface of third negative meniscus (15) towards image space side meets face
Type equation:
,
It is thereinc 4It is third negative meniscus (15) towards the curvature of one side surface of image space,r 4For third negative meniscus
(15) the radial coordinate perpendicular to optical axis direction,k 4It is third negative meniscus (15) towards the secondary of one side surface of image space
Conic constant,A 4It is third negative meniscus (15) towards the quadravalence asphericity coefficient of one side surface of image space,B 4For third bent moon
Shape negative lens (15) towards one side surface of image space six rank asphericity coefficients,C 4It is third negative meniscus (15) towards image space
Eight rank asphericity coefficients of one side surface,D 4Ten ranks for third negative meniscus (15) towards one side surface of image space are aspherical
Coefficient.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108594411A (en) * | 2018-06-04 | 2018-09-28 | 凯迈（洛阳）测控有限公司 | A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems |
| CN110850573A (en) * | 2019-11-14 | 2020-02-28 | 福建福光股份有限公司 | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594411A (en) * | 2018-06-04 | 2018-09-28 | 凯迈（洛阳）测控有限公司 | A kind of long-focus, heavy caliber, more visual field medium-wave infrared optical systems |
| CN110850573A (en) * | 2019-11-14 | 2020-02-28 | 福建福光股份有限公司 | Visible light, infrared dual-waveband of shortwave share aperture long focus optical system |
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