CN107870417A - A kind of controllable IR point source target simulator of background radiation - Google Patents

A kind of controllable IR point source target simulator of background radiation Download PDF

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Publication number
CN107870417A
CN107870417A CN201711090729.2A CN201711090729A CN107870417A CN 107870417 A CN107870417 A CN 107870417A CN 201711090729 A CN201711090729 A CN 201711090729A CN 107870417 A CN107870417 A CN 107870417A
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CN
China
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background
target
liquid nitrogen
infrared
diaphragm
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CN201711090729.2A
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Chinese (zh)
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CN107870417B (en
Inventor
高阳
费锦东
虞红
张盈
杜惠杰
张兴
赵宏鸣
杜渐
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北京仿真中心
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/0081Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 with means for altering, e.g. enlarging, the entrance or exit pupil

Abstract

The present invention discloses a kind of controllable IR point source target simulator of background radiation, including:Optical projection system, bundling device, infrared point target component, the liquid nitrogen circulatory system, background illumination optics system and infrared background component;The infrared point target source that the infrared point target component is formed forms the infrared point target of infinity by bundling device through optical projection system;The IR point source that the infrared background component is formed forms the infrared background full of whole visual field by bundling device reflection after the amplification of background illumination optics system through optical projection system;The liquid nitrogen circulatory system carries out cooling processing during the IR point source that the infrared point target source and infrared background component that infrared point target component is formed are formed.The controllable IR point source target simulator of background radiation of the present invention provides a background radiation controllable infrared point target source, solves the problems, such as that conventional IR point source target simulator background radiation can not quantify and controls.

Description

A kind of controllable IR point source target simulator of background radiation

Technical field

The present invention relates to IR point source target simulation technical field.More particularly, to a kind of controllable red of background radiation Outer point source target simulator.

Background technology

Usual point source infrared target simulator is not controlled to background radiation, when there is some to need particular radiation amount In the test of level background detection infrared target, not only need to provide IR point source target, it is also necessary to provide corresponding radiation intensity Infrared background, conventional infrared target simulator can not be competent at.

A kind of accordingly, it is desirable to provide IR point source target simulator that background radiation is controllable.

The content of the invention

It is an object of the invention to provide a kind of controllable IR point source target simulator of background radiation, solves in the past infrared The background radiation of Point Target simulator can not quantify the problem of controlling.

To reach above-mentioned purpose, the present invention uses following technical proposals:

The invention provides a kind of controllable IR point source target simulator of background radiation, including:Optical projection system, conjunction Beam device, infrared point target component, the liquid nitrogen circulatory system, background illumination optics system and infrared background component;

The infrared point target source that the infrared point target component is formed is formed infinite by bundling device through optical projection system Remote infrared point target;

The IR point source that the infrared background component is formed is anti-by bundling device after the amplification of background illumination optics system Penetrate and form the infrared background full of whole visual field through optical projection system;

The liquid nitrogen circulatory system is formed in the infrared point target source that infrared point target component is formed and infrared background component IR point source during carry out cooling processing.

Further, the bundling device is arranged on the optical axis of optical projection system, and the normal and optical axis of bundling device are at 45 ° Angle.

The bundling device is the flat-plate lens of one piece of half-reflection and half-transmission, respectively by reflecting and projecting optical projection system Optical axis is divided into orthogonal both direction, and the direction of reflection is named as background optical axis perpendicular to the optical axis of optical projection system, The direction for pointing to optical projection system is background optical axis forward direction, and opposite direction is background optical axis negative sense;Transmission direction is thrown with optics Shadow systematic optical axis overlap, and are named as target optical axis, the direction for pointing to optical projection system is that target optical axis forward direction opposite direction is Target optical axis negative sense.

Further, the infrared point target component includes target diaphragm, target aperture, target diaphragm fabrication hole, target Attenuator, target bearing, target bearing heat insulating mattress, target low motor and target black matrix;

Target diaphragm, for the background radiation of target optical axis direction to be dropped to liquid nitrogen temperature, eliminate the background of destination channel Radiation;The target diaphragm is arranged on along target optical axis negative sense on the focal plane of optical projection system, by a rectangle Metallic plate and one whole metal material liquid nitrogen circulation duct composition, plate thickness is about 2mm, and metallic plate is thrown towards optics The welding liquid nitrogen circulation duct of the one side convolution complications of shadow system, the input of pipeline are followed by target liquid nitrogen input pipe with liquid nitrogen Loop system is connected, and the output end of pipeline is connected by target return duct with the liquid nitrogen circulatory system.

Target diaphragm fabrication hole, for the target bearing behind target diaphragm fabrication hole is carried out the operation such as installation and maintenance and Avoid significantly cooling to target bearing;The target diaphragm fabrication hole is opened in the center of target diaphragm, a diameter of 10mm.

Target aperture, for the infrared signal of target black body radiation to be constrained into IR point source;The target aperture It is opened in the top and target optical axis intersection of target diaphragm fabrication hole, a diameter of 0.5mm.

Target bearing, target bearing heat insulating mattress, target attenuator are fixed together, under the driving of target low motor around Target bearing rotates so that diverse location passes through target optical axis on target attenuator, is provided on target optical axis direction different Transmitance.

Wherein, target attenuator is used to carry out decay modulation to the infrared signal that target black body radiation goes out;Target bearing comes From in target low motor, target low motor can be operated under vacuum and -40 DEG C of environment, to provide the drive of rotary motion Power;Target bearing heat insulating mattress, for linking objective bearing and target attenuator, while target bearing is not allowed to be declined with target again Subtract and carry out heat exchange between piece.Target attenuator is a circular gradual change attenuator, installed in target diaphragm to along target On optical axis negative sense distance objective diaphragm 0.8mm position, target bearing and target bearing heat insulating mattress are arranged on target attenuator At center;The axis of target bearing and the center overlapping of axles of target diaphragm fabrication hole, the head of target bearing passes through target bearing Heat insulating mattress is connected with target attenuator, the axis of target attenuator and the axis of target bearing and the axle of target diaphragm fabrication hole Line overlaps.

Target black matrix, for providing the source of infrared radiation of target optical axis direction, the infrared signal that target black body radiation goes out passes through Cross after target attenuator carries out decay modulation, constrain to form infrared point target source through target aperture, by bundling device through optics Optical projection system forms the infrared point target of infinite point.The target black matrix hangs down installed in target attenuator along target optical axis negative sense Directly at target optical axis.

Further, the infrared background component declines including background diaphragm, background aperture, background diaphragm fabrication hole, background Subtract piece, background black matrix, background bearing heat insulating mattress, background bearing and background low temperature electric machine;Wherein,

Background diaphragm, for the stray radiation elimination background optical axis direction;The background diaphragm is arranged on background illumination On the focal plane of optical system, it is made up of the liquid nitrogen circulation duct of a rectangular metallic plate and one whole metal material, gold Category plate thickness is about 2mm, and metallic plate is managed towards the tortuous welding liquid nitrogen circulation duct of the one side convolution of background illumination optics system The input in road is connected by background liquid nitrogen input pipe with the liquid nitrogen circulatory system, and the output end of pipeline passes through background return duct and liquid Nitrogen cycle system connects.

Background diaphragm fabrication hole, for the background bearing behind background diaphragm fabrication hole is carried out the operation such as installation and maintenance and Avoid significantly cooling to background bearing;The background diaphragm fabrication hole is opened in the center of background diaphragm, diameter 10mm.

Background aperture, for the infrared signal of background black body radiation to be constrained into IR point source;The background aperture It is opened in the top and background optical axis intersection of background fabrication hole, diameter 0.5mm.

Background bearing, background bearing heat insulating mattress, background reduction piece are fixed together, under the driving of background low temperature electric machine around Background bearing rotates so that diverse location passes through background optical axis on background reduction piece, is provided on background optical axis direction different Transmitance.

Wherein, background reduction piece, the infrared signal for going out to background black body radiation carry out decay modulation;Background bearing comes From in background low temperature electric machine, background low temperature electric machine can be operated under vacuum and -40 DEG C of environment, to provide the drive of rotary motion Power;Background bearing heat insulating mattress, for connecting background bearing and background reduction piece, while background bearing is not allowed to be declined with background again Subtract and carry out heat exchange between piece.Background reduction piece is a circular gradual change attenuator, installed in background diaphragm along background optical axis Negative sense installs background bearing and background bearing heat insulating mattress on background diaphragm 0.8mm position at the center of background reduction piece. The axis of background bearing and the center overlapping of axles of background diaphragm fabrication hole, the head of background bearing by background bearing heat insulating mattress with Background reduction piece is connected, and the axis of background reduction piece overlaps with the axis of the axis of background bearing and background diaphragm fabrication hole.

Background black matrix, for providing the source of infrared radiation of background optical axis direction, the infrared signal that background black body radiation goes out passes through Cross after background reduction piece carries out decay modulation, constrain to form infrared point target source through background aperture, pass through backlight illuminating system After amplification, the background full of the whole visual field of optical projection system is formed through optical projection system by bundling device reflection;The back of the body Scape black matrix be arranged on background reduction piece along background optical axis negative sense at background optical axis.

Further, the background illumination optics system, it is one group of amplification system, is formed for infrared background point source component IR point source is amplified, so as to the whole visual field full of optical projection system.The background illumination optics system is arranged on edge Background optical axis negative sense, optical axis and the background optical axis coincidence of background illumination optics system.

Further, the liquid nitrogen circulatory system is made up of compression pump, liquid nitrogen storage tank, for storing liquid nitrogen and will make liquid nitrogen in target Liquid nitrogen input pipe, target diaphragm, target return duct internal circulation flow, by the heat on target diaphragm by way of liquid nitrogen gasification By outside nitrogen discharge to system after return duct reclaims, and liquid nitrogen will be made in liquid nitrogen input pipe, heat sink, return duct inner recirculation flow It is dynamic, by the heat on background diaphragm by way of liquid nitrogen gasification after return duct reclaims by outside nitrogen discharge to system, to whole Individual system cooling.

Wherein, target liquid nitrogen input pipe is a kind of alloy pipeline of copper, and one end is ined succession the delivery outlet of the liquid nitrogen circulatory system, separately The input port of one end linking objective diaphragm, function are that the liquid nitrogen that can be allowed in the liquid nitrogen circulatory system enters target diaphragm, and target is returned Tube flowing structure is as target liquid nitrogen input pipe, the delivery outlet of one end linking objective diaphragm, the other end connection liquid nitrogen circulatory system Recovery port, function is to make liquid nitrogen in target diaphragm and nitrogen reflux to the liquid nitrogen circulatory system.Background liquid nitrogen input pipe is one The alloy pipeline of kind of copper, one end are ined succession the delivery outlet of the liquid nitrogen circulatory system, and the other end connects the input port of background diaphragm, and function is The liquid nitrogen that can be allowed in the liquid nitrogen circulatory system enters background diaphragm, and background flows back tubular construction as background liquid nitrogen input pipe, and one The delivery outlet of end connection background diaphragm, the other end connect the recovery port of the liquid nitrogen circulatory system, and function is to make the liquid in background diaphragm Nitrogen and nitrogen reflux are to the liquid nitrogen circulatory system.

At work, liquid nitrogen circulatory system progress liquid nitrogen circulates freezes to target diaphragm, target diaphragm and target attenuator Distance it is very near, the efficiency of radiant heat exchange is very high, also ensure that the heat on target attenuator conducts away so as to protect at any time Hold the low-temperature condition of target attenuator;When needing the brightness of variation targets, low temperature electric machine band moving-target bearing rotary to corresponding positions Put, now need the attenuation region of work to be exactly on target optical axis, be adjusted to the infrared intensity of subsequent target black matrix, pass through Cross target aperture and constrain to form point target and launch through optical projection system.

Liquid nitrogen circulatory system progress liquid nitrogen circulates to freeze to background diaphragm, and the distance of background diaphragm and background reduction piece is very Closely, the efficiency of radiant heat exchange is very high, also ensure that the heat on background reduction piece conducts away so as to keep background reduction at any time The low-temperature condition of piece;When needing to change the brightness of background, background low temperature electric machine drive background bearing rotary to relevant position, now Need the attenuation region of work to be exactly on background optical axis, the infrared intensity of background black matrix below is adjusted to, by background Aperture constrains to form IR point source, after the amplification of background illumination optics system, is formed and is full of through optical projection system visual field Infrared background.

Beneficial effects of the present invention are as follows:

The controllable IR point source target simulator of background radiation of the present invention provides a background radiation controllable infrared point mesh Mark source, solve the problems, such as that conventional IR point source target simulator background radiation can not quantify and control.

Brief description of the drawings

The embodiment of the present invention is described in further detail below in conjunction with the accompanying drawings.

Fig. 1 shows the controllable IR point source target simulator structural representation of background radiation of the present invention.

In accompanying drawing:1st, optical projection system, 2, bundling device, 3, infrared point target component, 30, target diaphragm, 31, target light Late hole, 32, target diaphragm fabrication hole, 33, target attenuator, 34, target bearing, 35, target bearing heat insulating mattress, 36, target it is low Warm motor, 37, target black matrix, 38, target liquid nitrogen input pipe, 39, target return duct, 4, the liquid nitrogen circulatory system, 5, background illumination Optical system, 6, infrared background component, 60, background diaphragm, 61, background aperture, 62, background diaphragm fabrication hole, 63, background declines Subtract piece, 64, background bearing, 65, background bearing heat insulating mattress, 66, background black matrix, 67, background low temperature electric machine, 68, background liquid nitrogen it is defeated Enter pipe, 69, background return duct.

Embodiment

In order to illustrate more clearly of the present invention, the present invention is done further with reference to preferred embodiments and drawings It is bright.Similar part is indicated with identical reference in accompanying drawing.It will be appreciated by those skilled in the art that institute is specific below The content of description is illustrative and be not restrictive, and should not be limited the scope of the invention with this.

The invention provides a kind of controllable IR point source target simulator of background radiation, including:Optical projection system 1, Bundling device 2, infrared point target component 3, the liquid nitrogen circulatory system 4, background illumination optics system 5 and infrared background component 6;It is described red The infrared point target source that exterior point target element 3 is formed forms the infrared point mesh of infinity by bundling device 2 through optical projection system 1 Mark;The IR point source that the infrared background component 6 is formed is reflected after the amplification of background illumination optics system 5 by bundling device 2 The infrared background full of whole visual field is formed through optical projection system 1;The liquid nitrogen circulatory system 4 is in infrared point target component 3 Cooling processing is carried out when during the IR point source that the infrared point target source of formation and infrared background component 6 are formed.

Further, the bundling device 2 is arranged on the optical axis of optical projection system 1, the normal of bundling device 2 and optical axis into 45° angle.

The bundling device 2 is the flat-plate lens of one piece of half-reflection and half-transmission, respectively by reflecting and projecting optical projection system 1 Optical axis be divided into orthogonal both direction, the direction of reflection is named as bias light perpendicular to the optical axis of optical projection system 1 Axle, the direction for pointing to optical projection system 1 is background optical axis forward direction, and opposite direction is background optical axis negative sense;Transmission direction and light The optical axis coincidence of optical projection system 1 is learned, is named as target optical axis, the direction for pointing to optical projection system 1 is positive opposite for target optical axis Direction is target optical axis negative sense.

Further, the infrared point target component 3 includes target diaphragm 30, target aperture 31, target diaphragm fabrication hole 32nd, target attenuator 33, target bearing 34, target bearing heat insulating mattress 35, target low motor 36 and target black matrix 37;

Target diaphragm 30, for the background radiation of target optical axis direction to be dropped to liquid nitrogen temperature, eliminate the back of the body of destination channel Scape radiates;The target diaphragm is arranged on along target optical axis negative sense on the focal plane of optical projection system 1, rectangular by one The liquid nitrogen circulation duct of the metallic plate of shape and one whole metal material composition, plate thickness are about 2mm, and metallic plate is towards optics The tortuous welding liquid nitrogen circulation duct of the one side convolution of optical projection system 1, the input of pipeline by target liquid nitrogen input pipe 38 with The liquid nitrogen circulatory system 4 is connected, and the output end of pipeline is connected by target return duct 39 with the liquid nitrogen circulatory system 4.

Target diaphragm fabrication hole 32, for carrying out installation and maintenance etc. to the target bearing 34 behind target diaphragm fabrication hole 32 Operate and avoid significantly to cool to target bearing 34;The target diaphragm fabrication hole 32 is opened in the centre bit of target diaphragm 30 Put, a diameter of 10mm.

Target aperture 31, the infrared signal for target black matrix 37 to be radiated are constrained to IR point source;The target light Late hole 31 is opened in the top and target optical axis intersection of target diaphragm fabrication hole 32, a diameter of 0.5mm.

Target bearing 34, target bearing heat insulating mattress 35, target attenuator 33 are fixed together, in target low motor 36 Rotated under driving around target bearing 34 so that diverse location passes through target optical axis on target attenuator 33, in target optical axis direction It is upper that different transmitances is provided.

Wherein, target attenuator 33 is used to carry out decay modulation to the infrared signal that target black matrix 37 gives off;Target axle Hold 34 and come from target low motor 36, target low motor 36 can be operated under vacuum and -40 DEG C of environment, to provide rotation The dynamic driving force of transhipment;Target bearing heat insulating mattress 35, for linking objective bearing 34 and target attenuator 33, while do not allow again Heat exchange is carried out between target bearing 34 and target attenuator 33.Target attenuator 33 is a circular gradual change attenuator, peace Mounted in target diaphragm 30 to along target optical axis negative sense distance objective diaphragm 30 be 0.8mm position on, target bearing 34 and mesh Parameter holds heat insulating mattress 35 at the center of target attenuator 33;The axis of target bearing 34 and target diaphragm fabrication hole 32 Center overlapping of axles, the head of target bearing 34 are connected by target bearing heat insulating mattress 35 and target attenuator 33, target attenuator 33 axis overlaps with the axis of target bearing 34 and the axis of target diaphragm fabrication hole 32.

Target black matrix 37, for providing the source of infrared radiation of target optical axis direction, the infrared letter that target black matrix 37 gives off Number after target attenuator 33 carries out decay modulation, infrared point target source is formed through the constraint of target aperture 31, by closing beam Device 2 forms the infrared point target of infinite point through optical projection system 1.The target black matrix 37 is arranged on the edge of target attenuator 33 Target optical axis negative sense is at target optical axis.

Further, the infrared background component 6 include background diaphragm 61, background aperture 61, background diaphragm fabrication hole 62, Background reduction piece 63, background black matrix 66, background bearing heat insulating mattress 65, background bearing 64 and background low temperature electric machine 67;Wherein,

Background diaphragm 61, for the stray radiation elimination background optical axis direction;The background diaphragm 61 is arranged on background On the focal plane of lamp optical system 5, by the liquid nitrogen circulation duct group of a rectangular metallic plate and one whole metal material Into plate thickness is about 2mm, and metallic plate circulates towards the tortuous welding liquid nitrogen of the one side convolution of background illumination optics system 5 Pipeline, the input of pipeline are connected by background liquid nitrogen input pipe 68 with the liquid nitrogen circulatory system 4, and the output end of pipeline passes through background Return duct 69 is connected with the liquid nitrogen circulatory system 4.

Background diaphragm fabrication hole 62, for carrying out installation and maintenance etc. to the background bearing 64 behind background diaphragm fabrication hole 62 Operate and avoid significantly to cool to background bearing 64;The background diaphragm fabrication hole 62 is opened in the centre bit of background diaphragm 61 Put, diameter 10mm.

Background aperture 61, the infrared signal for background black matrix 66 to be radiated are constrained to IR point source;The bias light Late hole 61 is opened in the top and background optical axis intersection of background fabrication hole, diameter 0.5mm.

Background bearing 64, background bearing heat insulating mattress 65, background reduction piece 63 are fixed together, in background low temperature electric machine 67 Rotated under driving around background bearing 64 so that diverse location passes through background optical axis on background reduction piece 63, in background optical axis direction It is upper that different transmitances is provided.

Wherein, background reduction piece 63, the infrared signal for being given off to background black matrix 66 carry out decay modulation;Background axle Hold 64 and come from background low temperature electric machine 67, background low temperature electric machine 67 can be operated under vacuum and -40 DEG C of environment, to provide rotation The dynamic driving force of transhipment;Background bearing heat insulating mattress 65, for connecting background bearing 64 and background reduction piece 63, while do not allow again Heat exchange is carried out between background bearing 64 and background reduction piece 63.Background reduction piece 63 is a circular gradual change attenuator, installation Background diaphragm 61 along background optical axis negative sense on the 0.8mm of background diaphragm 61 position, the center of background reduction piece 63 Place's installation background bearing 64 and background bearing heat insulating mattress 65.The axis of background bearing 64 and the central shaft of background diaphragm fabrication hole 62 Overlap, the head of background bearing 64 is connected by background bearing heat insulating mattress 65 and background reduction piece 63, the axle of background reduction piece 63 Line overlaps with the axis of background bearing 64 and the axis of background diaphragm fabrication hole 62.

Background black matrix 66, for providing the source of infrared radiation of background optical axis direction, the infrared letter that background black matrix 66 gives off Number after background reduction piece 63 carries out decay modulation, infrared point target source is formed through the constraint of background aperture 61, passes through background After illuminator amplification, reflected by bundling device 2 and formed through optical projection system 1 full of 1 whole visual field of optical projection system Background;The background black matrix 66 be arranged on background reduction piece 63 along background optical axis negative sense at background optical axis.

Further, the background illumination optics system 5, it is one group of amplification system, is formed for infrared background point source component IR point source be amplified, so as to the whole visual field full of optical projection system 1.The background illumination optics system 5 is installed Along background optical axis negative sense, optical axis and the background optical axis coincidence of background illumination optics system 5.

Further, the liquid nitrogen circulatory system 4 is made up of compression pump, liquid nitrogen storage tank, for storing liquid nitrogen and will make liquid nitrogen in mesh Standard liquid nitrogen addition pipe 38, target diaphragm 30, the internal circulation flow of target return duct 39, pass through liquid nitrogen by the heat on target diaphragm 30 The mode of gasification by outside nitrogen discharge to system, and will make liquid nitrogen in liquid nitrogen input pipe, heat sink, backflow after return duct reclaims Pipe internal circulation flow, the heat on background diaphragm 61 after return duct reclaims is arrived nitrogen discharge by way of liquid nitrogen gasification Outside system, cool to whole system.

Wherein, target liquid nitrogen input pipe 38 is a kind of alloy pipeline of copper, and one end is ined succession the output of the liquid nitrogen circulatory system 4 Mouthful, the input port of other end linking objective diaphragm 30, function is that the liquid nitrogen that can be allowed in the liquid nitrogen circulatory system 4 enters target diaphragm 30, the structure of target return duct 39 is as target liquid nitrogen input pipe 38, the delivery outlet of one end linking objective diaphragm 30, and the other end connects Connect the recovery port of the liquid nitrogen circulatory system 4, function is to make liquid nitrogen in target diaphragm 30 and nitrogen reflux to the liquid nitrogen circulatory system 4. Background liquid nitrogen input pipe 68 is a kind of alloy pipeline of copper, and one end is ined succession the delivery outlet of the liquid nitrogen circulatory system 4, the other end connection back of the body The input port of scape diaphragm 61, function are that the liquid nitrogen that can be allowed in the liquid nitrogen circulatory system 4 enters background diaphragm 61, background return duct 69 Structure is as background liquid nitrogen input pipe 68, the delivery outlet of one end connection background diaphragm 61, the other end connection liquid nitrogen circulatory system 4 Recovery port, function is to make liquid nitrogen in background diaphragm 61 and nitrogen reflux to the liquid nitrogen circulatory system 4.

At work, the progress of the liquid nitrogen circulatory system 4 liquid nitrogen circulates freezes to target diaphragm 30, and target diaphragm 30 declines with target Subtract that the distance of piece 33 is very near, the efficiency of radiant heat exchange is very high, also ensure that the heat on target attenuator 33 conducts at any time Walk so as to keep the low-temperature condition of target attenuator 33;When needing the brightness of variation targets, low temperature electric machine band moving-target bearing 34 Rotation now needs the attenuation region of work to be exactly on target optical axis, is adjusted to subsequent target black matrix 37 to relevant position Infrared intensity, form point target by the constraint of target aperture 31 and launched through optical projection system 1.

The progress liquid nitrogen of the liquid nitrogen circulatory system 4 circulates to freeze to background diaphragm 61, background diaphragm 61 and background reduction piece 63 Distance is very near, and the efficiency of radiant heat exchange is very high, also ensure that the heat on background reduction piece 63 conducts away so as to protect at any time Hold the low-temperature condition of background reduction piece 63;When needing to change the brightness of background, background low temperature electric machine 67 drives background bearing 64 to revolve Relevant position is gone to, now needs the attenuation region of work to be exactly on background optical axis, is adjusted to the red of background black matrix 66 below External radiation intensity, IR point source is formed by the constraint of background aperture 61, after the amplification of background illumination optics system 5, formation is filled The full infrared background through the visual field of optical projection system 1.

Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair The restriction of embodiments of the present invention, for those of ordinary skill in the field, may be used also on the basis of the above description To make other changes in different forms, all embodiments can not be exhaustive here, it is every to belong to this hair Row of the obvious changes or variations that bright technical scheme is extended out still in protection scope of the present invention.

Claims (9)

  1. A kind of 1. controllable IR point source target simulator of background radiation, it is characterised in that including:Optical projection system, close beam Device, infrared point target component, the liquid nitrogen circulatory system, background illumination optics system and infrared background component;
    The infrared point target source that the infrared point target component is formed forms infinity by bundling device through optical projection system Infrared point target;
    The IR point source that the infrared background component is formed is reflected after the amplification of background illumination optics system by bundling device to pass through Optical projection system forms the infrared background full of whole visual field;
    The liquid nitrogen circulatory system forms red in the infrared point target source that infrared point target component is formed and infrared background component Cooling processing is carried out in exterior point source procedure.
  2. 2. IR point source target simulator according to claim 1, it is characterised in that the bundling device is thrown installed in optics On the optical axis of shadow system, normal and the optical axis angle at 45 ° of bundling device.
  3. 3. IR point source target simulator according to claim 1, it is characterised in that the infrared point target component includes Target diaphragm, target aperture, target diaphragm fabrication hole, target attenuator, target bearing, target bearing heat insulating mattress, target are low Warm motor and target black matrix;
    Target diaphragm, for the background radiation of target optical axis direction to be dropped to liquid nitrogen temperature, eliminate the background radiation of destination channel;
    Target diaphragm fabrication hole, for carrying out the operation such as installation and maintenance to the target bearing behind target diaphragm fabrication hole and avoiding Significantly cool to target bearing;
    Target aperture, for the infrared signal of target black body radiation to be constrained into IR point source;
    Target bearing, target bearing heat insulating mattress, target attenuator are fixed together, around target under the driving of target low motor Bearing rotates so that diverse location passes through target optical axis on target attenuator, and different transmissions is provided on target optical axis direction Rate;
    Target black matrix, for providing the source of infrared radiation of target optical axis direction.
  4. 4. IR point source target simulator according to claim 3, it is characterised in that the target diaphragm is rectangular by one The liquid nitrogen circulation duct of the metallic plate of shape and one whole metal material composition, plate thickness are about 2mm, and metallic plate is towards optics The welding liquid nitrogen circulation duct of the one side convolution complications of optical projection system, the input of pipeline pass through target liquid nitrogen input pipe and liquid nitrogen The circulatory system is connected, and the output end of pipeline is connected by target return duct with the liquid nitrogen circulatory system.
  5. 5. IR point source target simulator according to claim 1, it is characterised in that the infrared background component includes the back of the body Scape diaphragm, background aperture, background diaphragm fabrication hole, background reduction piece, background black matrix, background bearing heat insulating mattress, background bearing With background low temperature electric machine;
    Background diaphragm, for the stray radiation elimination background optical axis direction;
    Background diaphragm fabrication hole, for carrying out the operation such as installation and maintenance to the background bearing behind background diaphragm fabrication hole and avoiding Significantly cool to background bearing;
    Background aperture, for the infrared signal of background black body radiation to be constrained into IR point source;Background bearing, background bearing every Heat pad, background reduction piece are fixed together, and are rotated under the driving of background low temperature electric machine around background bearing so that background reduction piece Upper diverse location passes through background optical axis, and different transmitances is provided on background optical axis direction;
    Background bearing, background bearing heat insulating mattress, background reduction piece are fixed together, around background under the driving of background low temperature electric machine Bearing rotates so that diverse location passes through background optical axis on background reduction piece, and different transmissions is provided on background optical axis direction Rate;
    Background black matrix, for providing the source of infrared radiation of background optical axis direction.
  6. 6. IR point source target simulator according to claim 5, it is characterised in that the background diaphragm is arranged on background On the focal plane of lamp optical system, by the liquid nitrogen circulation duct group of a rectangular metallic plate and one whole metal material It is about 2mm into, plate thickness, metallic plate is towards the tortuous welding liquid nitrogen runner pipe of the one side convolution of background illumination optics system Road, the input of pipeline are connected by background liquid nitrogen input pipe with the liquid nitrogen circulatory system, and the output end of pipeline is flowed back by background Pipe is connected with the liquid nitrogen circulatory system.
  7. 7. IR point source target simulator according to claim 1, it is characterised in that the background illumination optics system, The IR point source formed for infrared background point source component is amplified.
  8. 8. IR point source target simulator according to claim 1, it is characterised in that the liquid nitrogen circulatory system is used to store up Liquid storage nitrogen simultaneously will make liquid nitrogen in target liquid nitrogen input pipe, target diaphragm, target return duct internal circulation flow, by target diaphragm Heat by way of liquid nitrogen gasification after return duct reclaims by outside nitrogen discharge to system, and liquid nitrogen will be made to be inputted in liquid nitrogen Pipe, heat sink, return duct internal circulation flow, will after return duct reclaims by way of liquid nitrogen gasification by the heat on background diaphragm Nitrogen discharge is to outside system, giving whole system cooling.
  9. 9. IR point source target simulator according to claim 8, it is characterised in that the liquid nitrogen circulatory system is by pressure Pump, liquid nitrogen storage tank composition.
CN201711090729.2A 2017-11-08 Infrared point source target simulator with controllable background radiation CN107870417B (en)

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CN107870417B CN107870417B (en) 2020-12-22

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