CN210294682U - Dual-channel infrared scene simulator device - Google Patents
Dual-channel infrared scene simulator device Download PDFInfo
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- CN210294682U CN210294682U CN201921238234.4U CN201921238234U CN210294682U CN 210294682 U CN210294682 U CN 210294682U CN 201921238234 U CN201921238234 U CN 201921238234U CN 210294682 U CN210294682 U CN 210294682U
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Abstract
A dual-channel infrared scene simulator device comprises an interference source component, a target source component, a beam combiner and a telescope component; the interference source component comprises an interference source black body, an iris diaphragm, a swing mirror and an interference source objective lens group which are sequentially arranged; the target source component comprises a resistance array component and a target source objective lens group which are sequentially arranged; the beam combining mirror combines the energy radiated by the interference source black body and the energy radiated by the resistance array component, transmits the combined beam to the telescope component, and projects the combined beam to the exit pupil through the telescope component. The double-channel infrared scene simulator device can calculate and generate the infrared radiation characteristics and the infrared thermal images of the target and the background according to the theoretical model, and simulate the infrared thermal images of different targets under different meteorological conditions and different radiation backgrounds. Accurate, controllable and repeatable test conditions are provided for detection and evaluation of infrared detection and sensing equipment in a laboratory, so that comprehensive test and evaluation of the performance of the infrared detection and sensing equipment are realized in a development stage.
Description
Technical Field
The utility model relates to the field of optical technology, especially, relate to a binary channels infrared scene simulator device.
Background
For an infrared detection system, a field test is required to be performed in order to verify and evaluate whether the performance of the infrared detection system meets the design index requirements. However, in the field test, the infrared detection or sensing device is often placed in a real environment, and the test is performed by using a real target, and due to the limitation of actual conditions, the measured data of the target and the environment cannot be obtained comprehensively. In addition, the method is limited by environments such as weather, and limited data can be obtained by one test.
SUMMERY OF THE UTILITY MODEL
In view of the above, in order to overcome the defects and problems of the prior art, it is necessary to provide a dual-channel infrared scene simulator device with comprehensive test data.
A dual-channel infrared scene simulator device comprises an interference source component, a target source component, a beam combiner and a telescope component;
the interference source component comprises an interference source black body, an iris diaphragm, a swing mirror and an interference source objective lens group which are sequentially arranged, wherein the energy radiated by the interference source black body penetrates through the iris diaphragm to be emitted to the swing mirror, is reflected by the swing mirror to be emitted to the interference source objective lens group, and penetrates through the interference source objective lens group and the beam combining mirror in sequence to be emitted;
the target source assembly comprises a resistance array assembly and a target source objective lens set which are sequentially arranged, and energy radiated by the resistance array assembly penetrates through the target source objective lens set to be emitted to the beam combining lens and is emitted after being reflected by the beam combining lens;
and the beam combiner combines the energy radiated by the interference source black body and the energy radiated by the resistance array component, transmits the combined energy to the telescope component, and projects the combined energy to the exit pupil through the telescope component.
In one embodiment, the interference source black body is a uniform area light source.
In one embodiment, the interference source assembly further comprises a first chopper disposed between the iris and the oscillating mirror.
In one embodiment, the target source assembly further comprises a second chopper disposed between the resistive array assembly and the target source objective lens.
In one embodiment, the surface of the beam combiner is provided with a dielectric film.
In one embodiment, the oscillating mirror, the interference source objective lens group, the beam combining mirror and the telescope assembly are arranged on a first straight line;
the resistance array assembly and the target source objective lens are arranged on a second straight line;
the first straight line and the second straight line are vertically arranged.
In one embodiment, the surfaces of all the lenses of the interference source objective lens group are provided with antireflection films;
the surfaces of all lenses of the telescope component are provided with antireflection films;
and antireflection films are arranged on the surfaces of all the lenses of the target source objective lens group.
In one embodiment, the material of all lenses of the interference source objective lens group is germanium or silicon.
In one embodiment, the material of all lenses of the telescope assembly is germanium or silicon.
In one embodiment, all lenses of the target source objective lens group are made of germanium or silicon.
The dual-channel infrared scene simulator device is an integrated dual-channel infrared scene simulator device of a target source and an interference source, and comprises a target source simulator optical system and an interference source simulator optical system. The target source simulator optical system is used for dynamic simulation of a target scene. The interference source simulator optical system is used for realizing the simulation of a scene in the field so as to evaluate the performance of the photoelectric equipment. The double-channel infrared scene simulator device can calculate and generate the infrared radiation characteristics and the infrared thermal images of the target and the background according to the theoretical model, and simulate the infrared thermal images of different targets under different meteorological conditions and different radiation backgrounds. Accurate, controllable and repeatable test conditions are provided for detection and evaluation of infrared detection and sensing equipment in a laboratory, so that comprehensive test and evaluation of the performance of the infrared detection and sensing equipment are realized in a development stage.
Drawings
Fig. 1 is a schematic structural diagram of a dual-channel infrared scene simulator device according to an embodiment.
Fig. 2 is a schematic structural diagram of an optical system of a target source simulator of the above-mentioned dual-channel infrared scene simulator apparatus.
Fig. 3 is a schematic structural diagram of an interference source simulator optical system of the dual-channel infrared scene simulator device.
Fig. 4 is a diagram of the optical transfer function of the target source simulator optical system shown in fig. 2.
Fig. 5 is a diagram of an optical transfer function of the optical system of the interference source simulator shown in fig. 3.
Fig. 6 is a distortion curve of the target source simulator optical system shown in fig. 2.
Fig. 7 is a distortion curve of the optical system of the interference source simulator shown in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The fixed connection of the present invention includes direct fixed connection and indirect fixed connection.
Referring to fig. 1, a dual-channel infrared scene simulator device according to an embodiment includes an interference source assembly, a target source assembly, a combiner 4, and a telescope assembly.
The interference source component comprises an interference source black body 1, an iris diaphragm 2, a swing mirror 10 and an interference source objective lens group 6 which are sequentially arranged, energy radiated by the interference source black body 1 penetrates through the iris diaphragm 2 to be emitted to the swing mirror 10, is reflected by the swing mirror 10 to be emitted to the interference source objective lens group 6, and penetrates through the interference source objective lens group 6 and the beam combining mirror 4 in sequence to be emitted.
The target source assembly comprises a resistance array assembly 5 and a target source objective lens group 9 which are sequentially arranged, energy radiated by the resistance array assembly 5 penetrates through the target source objective lens group 9 to be emitted to the beam combining lens 4, and the energy is reflected by the beam combining lens 4 and then is emitted.
And the beam combiner 4 combines the energy radiated by the interference source black body 1 and the energy radiated by the resistor array component 5, transmits the combined energy to the telescope component, and projects the combined energy to the exit pupil through the telescope component.
According to the double-channel infrared scene simulator device, the interference source black body 1 radiates energy in a point light source mode after passing through the iris diaphragm 2, simulation of different incidence angles can be performed through the oscillating mirror 10, and after entering the interference source objective lens group 6, the interference source black body and the target source share a light path through the beam combining mirror 4 and are projected to the exit pupil through the telescope assembly. The target source light path is similar to the interference source, and the medium-wave infrared rays radiated by the resistive array component 5 form parallel light after passing through the target source objective lens group 9, are reflected by the beam combining mirror 4, share a light path with the interference source, are projected to the exit pupil through the telescope component, and are received by the detector.
The double-channel infrared scene simulator device is an infrared scene simulator device integrating a target source and an interference source, comprises a target source simulator optical system and an interference source simulator optical system, and adopts a refraction type partial common light path system. The target source simulator optical system comprises a telescope component, a beam combiner 4 and a target source component and is used for dynamic simulation of a target scene. The interference source simulator optical system comprises a telescope component, a beam combiner 4 and an interference source component, and is used for simulating the interference of a target scene and realizing the simulation of a field scene so as to evaluate the performance of the photoelectric equipment. The telescope component is a light path part shared by the target source simulator optical system and the interference source simulator optical system.
The double-channel infrared scene simulator device can calculate and generate the infrared radiation characteristics and the infrared thermal images of the target and the background according to the theoretical model, and simulate the infrared thermal images of different targets under different meteorological conditions and different radiation backgrounds. Accurate, controllable and repeatable test conditions are provided for detection and evaluation of infrared detection and sensing equipment in a laboratory, so that comprehensive test and evaluation of the performance of the infrared detection and sensing equipment are realized in a development stage. The infrared target simulator is used for generating infrared images to detect and evaluate infrared detection and sensing equipment, so that the method is convenient and feasible, low in price and capable of saving a large amount of experiment expenses.
In one embodiment, the telescope assembly comprises a first set of telescopes 7 and a second set of telescopes 8.
In the embodiment shown in fig. 1, the pendulum mirror 10, the interfering source objective lens group 6, the beam combining mirror 4 and the telescope assembly are arranged on a first straight line. The resistive array assembly 5 and the target source objective lens group 9 are arranged on the second straight line. The first straight line and the second straight line are vertically arranged. The arrangement can realize the miniaturization of the double-channel infrared scene simulator device by using the deflection light path.
In the embodiment shown in fig. 1, the target source assembly further comprises a filter 12 disposed between the resistive array assembly 5 and the target source objective lens assembly 9 for operating spectral band cut-off.
In the embodiment shown in fig. 1, the interference source blackbody 1 is a uniform area light source.
In the embodiment shown in fig. 1, the interference source assembly further comprises a first chopper 3, the first chopper 3 being arranged between the iris 2 and the oscillating mirror 10. The first chopper 3 acts as a shutter for the interference source assembly for implementing the interference source analog switch state control.
In the embodiment shown in fig. 1, the surfaces of all the lenses of the interference source objective lens group 6 are provided with antireflection films. The surfaces of all the lenses of the telescope component are provided with antireflection films. The surfaces of all the lenses of the target source objective lens group 9 are provided with antireflection films. Each surface of the lens is plated with an antireflection film, so that the utilization rate of infrared radiation can be effectively improved, and the reflection on the surface of an element is reduced, so that stray light of an optical system is inhibited.
In the embodiment shown in fig. 1, the surface of the beam combiner 4 is provided with a dielectric film.
The beam combiner 4 is selected according to the band of energies to be combined. The dielectric film is a plated dielectric film. And a dielectric film is arranged on the surface of the beam combining mirror 4 and is used for combining the interference source and the target source.
In the embodiment shown in fig. 1, the material of all the lenses of the interfering source objective lens group 6 is germanium or silicon.
In the embodiment shown in fig. 1, the material of all the lenses of the telescope assembly is germanium or silicon.
In the embodiment shown in fig. 1, all the lenses of the target source objective lens group 9 are made of germanium or silicon.
Germanium is an inert material, has good spectrum transmission performance in wave bands, and simultaneously has good mechanical property and heat conduction performance considering high hardness, good heat conduction, insolubility in water. Silicon is also a chemically inert material, has high hardness, is insoluble in water, is low in price and has better transmission performance in wave bands. The following table shows the thermal and optical characteristic parameters of the materials used.
| Material | Refractive index (3 μm) | Refractive index (5 μm) | dn/dt(×10-6) | Coefficient of thermal expansion (. times.10)-6) |
| Germanium (Ge) | 4.0451 | 4.0160 | 408 | 6.1 |
| Silicon | 3.432 | 3.422 | 160 | 4.15 |
As shown in fig. 2, the target source simulator optical system includes three parts, which respectively pass through the front collimating system, the beam combiner 23 and the rear focusing imaging objective lens along the light transmission direction, and finally reach the resistive array detector. The optical system is designed by adopting a refraction type optical system structure, and each surface of the lens is plated with a layer of antireflection film. Wherein the pre-collimation system comprises a first sheet lens 21 and a first sheet lens 22. The rear focusing imaging objective lens comprises a target source objective lens group which comprises a lens 24 and a lens 25.
When the optical system of the target source simulator is optimized, the problem that the aperture of a projection system is large is considered, certain requirements are required on the center thickness and the edge thickness of a lens during processing, and the edge thickness of the lens needs to be limited. The edge thicknesses of the first and third lenses 21 and 24, and the center thickness of the second lens 22 are limited, while defining the focal length of the system. And correcting each aberration of the projection system by taking the radius and the thickness of each element as variables to obtain the optical system structure.
Considering that a beam combiner is arranged between the front collimation system and the rear focusing imaging objective lens, the beam combiner needs to be unfolded according to an optical path to obtain the thickness of an equivalent parallel flat plate, and the distance between the beam combiner and the lens is added, and meanwhile, considering the influence of the beam combiner 23 on aberration, the optimization is carried out.
As shown in fig. 3, the optical system of the interference source simulator includes three parts, which respectively pass through the front collimating system, the beam combiner 33 and the rear focusing imaging objective lens along the light transmission direction, and finally reach the interference light source. Wherein the pre-collimation system comprises a first sheet lens 31 and a second sheet lens 32. The rear focus imaging objective comprises a lens 34 and a lens 35. The design of the optical system of the interference source simulator is the same as that of the optical system of the target source simulator, and is not repeated herein.
As shown in fig. 4 and 5, the optical transfer function diagrams of the target source simulator optical system and the interference source simulator optical system are shown. The optical transfer function is a function of the modulation degree and phase shift of the image transferred with the spatial frequency as a variable, and is a generic term of an amplitude transfer function and a phase transfer function. The optical transfer function is used for evaluating the imaging quality of the optical system, and is based on the fact that an object is considered to be composed of spectrums of various frequencies, namely the light field distribution function of the object is expanded into a Fourier series or Fourier integral form. The optical transfer function reflects the transfer capability of different frequency components of an object, and generally speaking, a high frequency part reflects the detail transfer condition of the object, a medium frequency part reflects the hierarchy transfer condition of the object, and a low frequency part reflects the outline transfer condition of the object. For imaging optics, it is the amplitude transfer function that affects the imaging quality, so we generally consider only. Is the ratio of the image modulation to the object modulation, the modulation being defined as the sum of the maximum intensity and the minimum intensity over the difference between the maximum intensity and the minimum intensity. The meridional transfer function and the sagittal transfer function of the projection system, and the transfer function curves of the various fields of view. As can be seen from the figure, the whole transfer function curve meets the requirement of optical indexes, and the imaging quality is good.
As shown in fig. 6 and 7, the distortion curves of the target source simulator optical system and the interference source simulator optical system are shown. Distortion exists because the wide light beam and the thin light beam of the off-axis point have aberration, so that the heights of the principal ray and the Gaussian image surface are not equal to the height of an ideal image, and the difference is distortion. The distortion is caused because the spherical aberration of the principal ray is different with the change of the field angle, so that the magnification is changed with the field angle on a pair of conjugate object image planes, and is not constant. The distortion of the optical system is classified into pincushion distortion and barrel distortion. The distortion does not affect the sharpness of the image, but the presence of the distortion changes the shape of the image, resulting in distortion of the image. The figure shows the distortion of a projection system, and as can be seen from the figure, the distortion of an optical system of a target source simulator is controlled within 0.5 percent, and the influence on the imaging quality is not great; the distortion of an optical system of the interference source simulator is controlled within 0.6 percent, and the influence on the imaging quality is not great;
the double-channel infrared scene simulator device can realize real-time and dynamic simulation of the change condition of a real scene. The images produced by the above two-channel infrared scene simulator device have high spatial resolution, high frame rate, no dead pixels, and have higher gray scale and better spatial uniformity. The double-channel infrared scene simulator device has a large field angle which can reach about 6 degrees; the imaging quality is better, and the distortion is better than 0.5%; the deviation of the energy center from the main ray is 7 ', and the collimation precision of the optical system is better than 10'; the double-channel infrared scene simulator device belongs to a double-channel integrated design, and is compact in structure and small in size.
The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A dual-channel infrared scene simulator device is characterized by comprising an interference source component, a target source component, a beam combiner and a telescope component;
the interference source component comprises an interference source black body, an iris diaphragm, a swing mirror and an interference source objective lens group which are sequentially arranged, wherein the energy radiated by the interference source black body penetrates through the iris diaphragm to be emitted to the swing mirror, is reflected by the swing mirror to be emitted to the interference source objective lens group, and penetrates through the interference source objective lens group and the beam combining mirror in sequence to be emitted;
the target source assembly comprises a resistance array assembly and a target source objective lens set which are sequentially arranged, and energy radiated by the resistance array assembly penetrates through the target source objective lens set to be emitted to the beam combining lens and is emitted after being reflected by the beam combining lens;
and the beam combiner combines the energy radiated by the interference source black body and the energy radiated by the resistance array component, transmits the combined energy to the telescope component, and projects the combined energy to the exit pupil through the telescope component.
2. The dual channel infrared scene simulator device of claim 1, wherein the interference source black body is a uniform area light source.
3. The dual channel infrared scene simulator device of claim 1, wherein the interference source assembly further comprises a first chopper, the first chopper being disposed between the iris diaphragm and the oscillating mirror.
4. The dual-channel infrared scene simulator device of claim 1, wherein the target source assembly further comprises a second chopper that is disposed between the resistive array assembly and the target source objective lens assembly.
5. The dual-channel infrared scene simulator device of claim 1, wherein a surface of the beam combiner is provided with a dielectric film.
6. The dual-channel infrared scene simulator device of claim 1, wherein the oscillating mirror, the interfering source objective lens set, the beam combining mirror, and the telescope assembly are disposed on a first line;
the resistance array assembly and the target source objective lens are arranged on a second straight line;
the first straight line and the second straight line are vertically arranged.
7. The dual-channel infrared scene simulator device of claim 1, wherein the surfaces of all the lenses of the set of interfering source objects are provided with an antireflection film;
the surfaces of all lenses of the telescope component are provided with antireflection films;
and antireflection films are arranged on the surfaces of all the lenses of the target source objective lens group.
8. The dual-channel infrared scene simulator device of claim 1, wherein all lenses of said set of interfering source objects are of germanium or silicon.
9. The dual-channel infrared scene simulator device of claim 1, wherein all lenses of the telescope assembly are made of germanium or silicon.
10. The dual-channel infrared scene simulator device of claim 1, wherein all lenses of the set of target source objects are of germanium or silicon.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114935751A (en) * | 2022-05-13 | 2022-08-23 | 中国科学院西安光学精密机械研究所 | High-digital dynamic target simulator and simulation method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114935751A (en) * | 2022-05-13 | 2022-08-23 | 中国科学院西安光学精密机械研究所 | High-digital dynamic target simulator and simulation method |
| CN114935751B (en) * | 2022-05-13 | 2024-04-12 | 中国科学院西安光学精密机械研究所 | High-digital dynamic target simulator and simulation method |
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