CN107576401A - A kind of refrigeration mode thermal imaging system - Google Patents
A kind of refrigeration mode thermal imaging system Download PDFInfo
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- CN107576401A CN107576401A CN201710854703.4A CN201710854703A CN107576401A CN 107576401 A CN107576401 A CN 107576401A CN 201710854703 A CN201710854703 A CN 201710854703A CN 107576401 A CN107576401 A CN 107576401A
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- microscope group
- thermal imaging
- imaging system
- objective lens
- refrigeration mode
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Abstract
The invention discloses a kind of refrigeration mode thermal imaging system.The refrigeration mode thermal imaging system includes：Objective lens and relaying microscope group；Intermediate image plane between the objective lens and the relaying microscope group be present, the telecentric beam path in image space of the objective lens docks with the object space telecentric beam path of the relaying microscope group.Refrigeration mode thermal imaging system disclosed by the invention is spliced by focal plane, the technical characterstic and requirement of refrigeration mode thermal imaging system can be directed to, solves the low outer visual field illumination of axle caused by direct splicing, cold door screen matching and the questions of substance such as optical design difficulty is big.
Description
Technical field
The present invention relates to optical technical field, more particularly to a kind of refrigeration mode thermal imaging system.
Background technology
Thermal imaging is to produce the image of scenery by the emissivity difference between detection target and background.It need not
It is the technology of completely passive imaging by infrared light supply and the night sky light, is not easy to be found and disturbed by other side, mist, puppet can be penetrated
Dress etc., has certain target identification ability, using the teaching of the invention it is possible to provide round-the-clock service, therefore competitively ground as each advanced country of the world
The new and high technology studied carefully and developed.With the continuous development of thermal imaging, high-resolution, the thermal imaging system of big visual field turn into hair
Exhibition trend, therefore just with the presence of the contradiction being imaged between big visual field and the effective pixel number of infrared detector.When monolithic infrared acquisition
, it is necessary to which multi-disc infrared detector is connected into when the pixel total length of device can not meet the visual field cover width requirement of camera imaging
One wide visual field detector, referred to as focal plane splice.
In order to obtain the system sensitivity of maximum, most of thermal imaging systems use the detector of cryogenic refrigeration, detector
It is usually operated at 77K liquid nitrogen temperatures or lower temperature.Detector in low temperature can not only detect the hot spoke for coming from target
Penetrate, can also detect the heat radiation come from inside optical system.Usual refrigeration detector focal plane front end sets a center
Round-meshed cold apron is referred to as cold stop, it is therefore an objective to suppression system internal radiation.Distance of the cold stop apart from focal plane be about
20mm or so, if incidence angle of the visual field on focal plane will certainly be increased outside axle so as to reduce by directly splicing to detector
The illumination of the outer visual field of axle.During the incidence angle increase of the outer visual field of axle, the diaphragm aberration control difficulty of system is also very big, adds light
The design difficulty of system.Of course, it is possible to solves problem above by increasing the method for cold stop and focal plane distance, still
This detector is not general, to be customized according to requirements, can so increase cooling system power consumption, production cost and week
Phase.Therefore, there is an urgent need to a kind of new focal plane joining method, common refrigerated infrared detector can be used to realize that focusing is flat
Splice in face.
The content of the invention
It is contemplated that the defects of overcoming prior art to exist, the present invention uses following technical scheme：
The invention provides a kind of refrigeration mode thermal imaging system.The refrigeration mode thermal imaging system includes：Objective lens and
Relay microscope group；Intermediate image plane be present between the objective lens and the relaying microscope group, the telecentric beam path in image space of the objective lens with
The object space telecentric beam path docking of the relaying microscope group.
In certain embodiments, the objective lens and relaying microscope group are connected by visual field dispenser.
In certain embodiments, one objective lens are docked with two or more relaying microscope groups.
In certain embodiments, the optical axis of the relaying microscope group and the optical axis of the objective lens are misaligned.
In certain embodiments, in addition to detector, the quantity of the relaying microscope group are identical with the detector quantity；Institute
The quantity for stating visual field dispenser is identical with the detector quantity.
In certain embodiments, the objective lens and relay lens group are made up of more than one lens or speculum respectively.
In certain embodiments, the objective lens will come from object scene radiation or other microscope group emergent light energy imagings arrive
Intermediate image plane, the objective lens include entrance pupil 11, the first microscope group and the second microscope group being arranged in order.
In certain embodiments, the relaying microscope group includes the 3rd microscope group and the 4th microscope group being arranged in order.
In certain embodiments, the visual field dispenser is staggered plane mirror to realize to objective lens image planes
Segmentation；The visual field dispenser is located near intermediate image plane.
In certain embodiments, the optical axis of the relaying microscope group and the chief ray weight of each middle focal plane imaging regional center
Close.
The technique effect of the present invention：Refrigeration mode thermal imaging system disclosed by the invention is spliced by focal plane, energy
The technical characterstic and requirement of refrigeration mode thermal imaging system are enough directed to, solves the outer visual field illumination of axle caused by direct splicing
The questions of substance such as low, cold door screen matching and optical design difficulty are big.
Brief description of the drawings
Fig. 1 is the structured flowchart according to the refrigeration mode thermal imaging system of one embodiment of the invention；
Fig. 2 is the structural representation according to the refrigeration mode thermal imaging system of one embodiment of the invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing and specific implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only explaining this hair
It is bright, without being construed as limiting the invention.
It is a kind of refrigeration mode thermal imaging system 100 provided by the invention with reference to shown in figure 1 and Fig. 2.The refrigeration mode heat into
As system 100 includes：Objective lens 10 and relaying microscope group 20；Centre be present between the objective lens 10 and the relaying microscope group 20
Image planes 30, the telecentric beam path in image space of the objective lens 10 dock with the object space telecentric beam path of the relaying microscope group 20.
In certain embodiments, the objective lens 10 and relaying microscope group 20 are connected by visual field dispenser 40；
In certain embodiments, one objective lens 10 are docked with two or more relaying microscope groups 20.
In certain embodiments, the optical axis of the relaying microscope group 20 and the optical axis of the objective lens 10 are misaligned.
In certain embodiments, in addition to detector, the quantity of the relaying microscope group 20 are identical with the detector quantity；
The quantity of the visual field dispenser 40 is identical with the detector quantity.
In certain embodiments, the objective lens 10 and relaying microscope group 20 are respectively by more than one lens or speculum structure
Into.
In certain embodiments, the objective lens 10 will come from object scene radiation or other microscope group emergent light energy imagings
To intermediate image plane, the objective lens 10 include entrance pupil 11, the first microscope group 12 and the second microscope group 13 being arranged in order.
In certain embodiments, the relaying microscope group 20 includes the 3rd microscope group 21 and the 4th microscope group being arranged in order.
In certain embodiments, the visual field dispenser 40 is staggered plane mirror to realize to objective lens 10
The segmentation of image planes；The visual field dispenser 40 is located near intermediate image plane.
In certain embodiments, the optical axis of the relaying microscope group 20 and the chief ray of each middle focal plane imaging regional center
Overlap.
As shown in Fig. 2 it is a specific embodiment provided by the invention.The objective lens are by entrance pupil 11, the first microscope group 12
Formed with the second microscope group 13 3, it is that will be radiated from object scene or other microscope group emergent light energy imagings are to intermediary image that it, which is acted on,
Face 30.The characteristics of light path is that telecentric beam path in image space i.e. objective lens emergent pupil is located at image space infinity.
Two the 3rd microscope groups 21, the 4th microscope group 22 respectively constitute two identical relaying microscope groups 20.Relay microscope group 20 in the future
Detector image planes 9 are imaged onto respectively from the energy in intermediate image plane 30.In order to realize that being connected the light path with objective lens pupil uses
Object space telecentric beam path.Emergent pupil picture positioned at infinity is also matched spy by relaying microscope group 20 while realizing and transmit intermediate image plane 30
Survey cold late the 8 of device.
Visual field dispenser 40 is made up of the plane mirror 41 near intermediate image plane 30, plane mirror 42.Visual field
The effect of dispenser 40 is to be cut the visual field of intermediate image plane 30, and light energy is delivered to two relaying microscope groups respectively
20.Plane mirror 41, the arrangement mode of plane mirror 42 can determine according to visual field and volume requirement.
The optical axis of rear end relaying microscope group 20 exists relative to the optical axis of objective lens 10 to be deviateed, and this deviation can be along intermediate image plane
30 any direction planar.The optical axis for relaying microscope group 20 should be with the chief ray of respective middle focal plane imaging regional center
Overlap.
The structure that the structure of the present invention is as shown in Figure 1 is implemented.The index that optical system reaches is：Focal length 99.8mm, is regarded entirely
14 ° of field, relative aperture 1:2.Each microscope group focal length and spacing case are as shown in table 1.
Each microscope group focal length distribution of table 1 and interval
Two relaying microscope groups 20 have identical optical parametric, therefore only list one.At intermediate image plane 30, relay lens
The optical axis of group 20 is respectively 2.8mm, 9.8mm relative to offset of the optical axis of objective lens 10 along X-axis and Y-axis；Another relaying
The optical axis of microscope group 20 is -2.8mm, -9.8mm along the offset of X-axis and Y-axis relative to the optical axis of objective lens 10.Visual field dispenser
40, which tilt 45 °, turns back relay system optical axis 90 °, thus realizes and utilizes two independent linear arrays or the infrared spy of face battle array refrigeration mode
Survey the field stitching of device.
The technique effect of the present invention：The refrigeration mode thermal imaging system present invention disclosed by the invention, which realizes, utilizes two independences
Linear array or face battle array refrigeration type infrared detector field stitching, for refrigeration mode thermal imaging system focal plane splicing provide one kind
New optic splice mode, by using objective lens telecentric beam path in image space with relaying microscope group object space telecentric beam path docking mode,
Realize that two systems unite the linking of effective pupil and cold door screen matches, energy loss caused by pupil shearing will not be produced.And easily control
Diaphragm aberration processed, reduce the difficulty of optical design.And field of view edge illumination degradation will not be made.The refrigeration mode thermal imaging system
System can directly utilize existing commercial refrigeration type infrared detector, be modified without carrying out structure to detection, it is not required that special
It is different to require customization, thus reduce development cost.The described focal plane connecting method that the application provides extends to multiple systems
The splicing of cold mould infrared detector, it is very extensive available for thermal imaging camera, microscopic system and telescopic system, purposes.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
The embodiment of present invention described above, is not intended to limit the scope of the present invention..Any basis
Various other corresponding changes and deformation made by the technical concept of the present invention, should be included in the guarantor of the claims in the present invention
In the range of shield.
Claims (10)
- A kind of 1. refrigeration mode thermal imaging system, it is characterised in that including：Objective lens and relaying microscope group；The objective lens and institute State between relaying microscope group and intermediate image plane be present, the telecentric beam path in image space of the objective lens and the object space telecentricity light of the relaying microscope group Dock on road.
- 2. refrigeration mode thermal imaging system according to claim 1, it is characterised in that the objective lens and relaying microscope group are led to Visual field dispenser is crossed to be connected.
- 3. refrigeration mode thermal imaging system according to claim 1, it is characterised in that one objective lens and two or two The microscope group docking of relaying more than individual.
- 4. refrigeration mode thermal imaging system according to claim 1, it is characterised in that it is described relaying microscope group optical axis with it is described The optical axis of objective lens is misaligned.
- 5. refrigeration mode thermal imaging system according to claim 2, it is characterised in that also including detector, the relay lens The quantity of group is identical with the detector quantity；The quantity of the visual field dispenser is identical with the detector quantity.
- 6. refrigeration mode thermal imaging system according to claim 1, it is characterised in that the objective lens and relay lens group difference It is made up of more than one lens or speculum.
- 7. refrigeration mode thermal imaging system according to claim 6, it is characterised in that the objective lens will come from object scene Radiation or other microscope group emergent light energy imagings include entrance pupil 11, the first mirror being arranged in order to intermediate image plane, the objective lens Group and the second microscope group.
- 8. refrigeration mode thermal imaging system according to claim 6, it is characterised in that the relaying microscope group includes being arranged in order The 3rd microscope group and the 4th microscope group.
- 9. refrigeration mode thermal imaging system according to claim 2, it is characterised in that the visual field dispenser is staggered Plane mirror to realize the segmentation to objective lens image planes；The visual field dispenser is located near intermediate image plane.
- 10. refrigeration mode thermal imaging system according to claim 1, it is characterised in that the optical axis of the relaying microscope group with it is each Overlapped from the chief ray of middle focal plane imaging regional center.
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| CN201710854703.4A CN107576401B (en) | 2017-09-20 | 2017-09-20 | A kind of refrigeration mode thermal imaging system |
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| CN201710854703.4A CN107576401B (en) | 2017-09-20 | 2017-09-20 | A kind of refrigeration mode thermal imaging system |
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| CN107576401B CN107576401B (en) | 2018-11-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873289A (en) * | 2018-09-04 | 2018-11-23 | 中国科学院长春光学精密机械与物理研究所 | Microcobjective optical system and optical device |
| CN112711126A (en) * | 2020-12-31 | 2021-04-27 | 中国科学院长春光学精密机械与物理研究所 | Optical splicing imaging device |
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Cited By (3)
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| CN112711126A (en) * | 2020-12-31 | 2021-04-27 | 中国科学院长春光学精密机械与物理研究所 | Optical splicing imaging device |
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