Gyro stabilized platform is sensitive to external angle change, and is mainly used to effectively isolate the influence of angle disturbance on the attitude maintenance of stabilized platform[1-3]. In order to provide the simulation environment of external angle disturbance for the stable platform, this paper designs an azimuth and pitch two-dimensional angular motion excitation device, which can effectively simulate the low-frequency angular disturbance condition below 20Hz. The angular motion range can reach ±50°azimuth, and the pitch axis can reach ±70°. The positioning accuracy is 10″. The device provides a good man-machine interface, which can display the motion data of each axis in real time. At the same time, considering the safety of use, the design has electrical, software and mechanical multi-level limit measures, which can realize automatic monitoring and system protection.
The detection, recognition and tracking of moving targets are important research contents of photoelectric detection technology, and the evaluation of tracking performance needs corresponding test and verification environment. In this paper, a high stable angle motion simulation device of infrared/visible target is designed. The tested product and the optical axis of infrared/visible target are quickly aligned by optical alignment device. At the same time, the angular motion simulation device can accurately measure and control the position, angle and angular acceleration information of the target relative to the tested product, and the angular motion range can reach 360° forward and reverse continuous rotation. The design can effectively simulate the target's one-dimensional angular motion environment in the laboratory, and provide test conditions for the tracking performance evaluation of photoelectric detection technology.
The high stiffness self-collimating light pipe is mounted on the single-axis angular vibration table, and is mainly used for the adjustment and debugging of the plane mirror. By monitoring the angle change of the plane mirror, the corresponding test is completed with the photoelectric product..The designed self-collimating light pipe can withstand an angular vibration environment with a vibration frequency of 0.1 Hz to 25 Hz, and the optical axis jitter does not exceed 3" during use.The high stiffness self-collimating light pipe is mainly composed of four parts: optical system, mechanical structure, electronic control system and embedded software.The optical system is mainly composed of a collimating objective lens, a reticle and a light source to form a signal transmitting system, a beam splitter and a signal receiving system including a CCD to realize the transmission and reception of light energy.In order to improve the test accuracy, the optical system collimating objective lens adopts a telephoto optical system, and the main surface of the telephoto optical system is away from the ens group, which can ensure the focal length (200 mm) and the overall size of the optical system.The telephoto optical system consists of a positive lens group and a negative mirror group. The positive and negative lens combination not only reduces the axial dimension of the system but also effectively corrects the spherical aberration of the system.As a high-precision angle measuring system, in order to eliminate the measurement error caused by the axial displacement of the CCD target surface and the focal plane of the optical system, the optical system is designed in the form of an image telecentric optical path. Finally, the angular accuracy can be no more than 2".
As a practical test method, semi-physical simulation plays an increasingly important role in the development of airborne photoelectric pods.Since the position of the sensor of different products is different from the center of the rotation, this results in a fixed position scene projector in the semi-physical simulation system that cannot achieve the optical connection with the sensor of the airborne photoelectric pods.Aiming at the problem that the existing semi-physical simulation system scene projector can not move, a set of optical axis translation device is designed.The device can realize the optical axis translation of the scene projector, and the distance and the angle of the optical axis translation can be adjusted, which can effectively realize the optical projector of the scene projector and the airborne photoelectric pod sensor
In order to improve the readability of infrared image, this paper proposes an image fusion algorithm based on the characteristics of the target region. The algorithm uses wavelet transform to decompose the multi-source image, and uses image segmentation algorithm to extract the target features of the multi-source image, and then uses different fusion strategies to fuse the infrared image and the visible image according to the features of the infrared image extraction and the low-frequency and high-frequency components of the visible image in different regions. The simulation results show that the algorithm can achieve better image fusion results.
In this paper, a design configuration of infrared guiding source for laser cooperative target is proposed. In this configuration, the infrared radiation target surface can effectively reduce the heat dissipation speed and ensure the uniform distribution of temperature radiation at the edge and the center by setting a wind shield, an independent edge circular electric heating film and a temperature PID control loop. It can provide effective infrared characteristic target for infrared / laser common optical path ranging system and guide laser ranging accurately.
The key technologies involved in airborne wireless laser communication are: high power miniaturized laser design technology, fast acquisition of moving targets, tracking technology, high sensitivity anti-disturbance optical signal receiving technology and so on. In addition, the technologies that need to be considered are pneumatic optical compensation technology, atmospheric channel compensation technology and multi-platform laser communication networking technology. In this paper, the above techniques are studied.
The laser anti-collision imaging radar is composed of the following key technologies: high beam quality, high repetition frequency, high power laser shooting machine technology, high sensitivity-high precision receiving technology, high efficiency-fast and linear optical scanning technology, and fast image processing and obstacle recognition and warning technology, etc. This paper studies on the key technology above.
Proc. SPIE. 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications
KEYWORDS: Unmanned aerial vehicles, Laser processing, Laser applications, Power supplies, Control systems, Signal processing, Signal detection, Pulsed laser operation, Laser systems engineering, Airborne laser technology
This paper introduced some kind of rapid an accurate detected laser system using on UAV. Composing, function and key technology of this system were discussed. A kind of detected system with character of miniaturization and lightweight was designed. This system can be used on UAV and detect rapidly an accurately.
The wide temperature range measuring equipment introduced in this paper adopts precision multi-spectral optical axis measurement, high and low temperature optics-mechanical compensation and so on. It has the function of debugging and testing the emission optical axis. It has the advantages of advanced technical index, good performance, strong generality, strong expansibility, etc., and can work stably at -40°C～60°C.
Proc. SPIE. 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications
KEYWORDS: Detection and tracking algorithms, Laser energy, Single photon, Interference (communication), Optical simulations, Single photon detectors, Signal detection, Environmental sensing, Laser systems engineering, Ranging
In this paper, the test environment of all-state single-photon remote detection system established in the laboratory is introduced. In this environment, a noise-free test environment is established, and a quantitative measurement device is established for the sensitivity test of the single-photon receiving system, and the sensitivity test can be carried out without background noise and background noise so as to verify the compliance of the design. And a dynamic target algorithm verification environment is established to test the single-photon dynamic algorithm. The test system is matched with a narrow line-width high-repetition frequency test device, and basically can test the main performance indexes of single-photon, and provides technical support for the design and development of a single-photon remote test system.
In this paper, a comprehensive test environment is designed to simulate one or more enemy laser sources with different characteristics in the laboratory, which can be used to test the main technical specifications of the laser alarm system. The same optical path as the laser source is also the infrared target source, which provides targets with infrared characteristics for tracking and performance measurement of infrared interference systems. At the same time, the environment is dynamic, which can simulate the relative motion of the carrier and the target machine, and investigate the dynamic performance index. The establishment of this environment can test the main performance indexes of laser alarm system and infrared interference system, and can investigate the stability of the index in dynamic environment.
Vibration is one of the main factors that greatly affect the tracking and stability of photoelectric detection. With the development of technology for many years, the simulation of vibration conditions has gradually developed from single line vibration or angle disturbance to line angle compound vibration. In this paper, the working principle and application of two kinds of multi-degree of freedom line-angle composite vibration system are introduced, and the differences between the two main mechanisms and simulation systems are compared and analyzed, which provides a theoretical support for the photoelectric detection technology to carry out the vibration reproduction test in the laboratory.
In the infrared detection and imaging system, due to the influence of detector aperture, system imperfection, measurement noise and other factors, the infrared detection image usually has the disadvantages of low contrast, poor signal-to-noise ratio, blurred visual effect and so on. In order to solve this problem, this paper proposes an infrared image denoising and enhancement algorithm based on the guidance filter. The algorithm realizes a linear shift local linear filter by introducing the guidance image as the prior information, so as to enhance the edge details of the infrared image and remove the image noise at the same time. The simulation results show that compared with the traditional denoising and enhancement algorithm, this method can effectively improve the visual effect of infrared detection image, enhance the edge detection information of the target, and has the advantages of fast processing speed.
As a key device to ensure that the aircraft is not destroyed by missiles, the missile warning system is gradually developing in the direction of multi-band, high sensitivity and global scope.In response to this trend, a dual-wavelength medium-wave infrared radiation simulation source was developed. The simulation source can achieve energy radiation with radiation intensity exceeding 1000 W / Sr in the two windows of the atmospheric window, 2 μm～3 μm and 3μm～ 5μm. The radiant energy in the two bands can be adjusted independently to achieve dual-band composite energy radiation.The dual-band mid-wave infrared radiation simulation source consists of a 2μm ～ 3μm radiation source, a 3μm～5μm radiation source, a louver assembly, and control components. The radiant energy of the two bands of 2μm～ 3μm and 3μm ～ 5μm is realized by two sets of radiation sources, and energy radiation of two bands is realized respectively.The radiation source is composed of a medium wave infrared light source, a collimating reticle, a band pass filter and the like.The collimating reticle is a reflective light bowl structure that uses a metal parabolic mirror and a high reflectivity film layer on its inner layer to form an infinite target beam of a particular field of view. By optimizing the design and combination, the collimated beam has a radiation range of 2° × 2°. The opening and closing of the blinds can be as fast as 15ms. The opening and closing angle of the blinds can be programmed to simulate the radiation energy changes of the incoming missiles.Finally, the resolution of the radiation intensity in the range of 0～150 W/Sr is 0.3 W/Sr, and the resolution in the range of 150W/Sr～1000 W/Sr is 1.5 W/Sr
Under the background of the test equipment adopting the generalized platform hardware environment, an automatic test system design implementation method is proposed, which will divide the test resource information into test elements such as device library, ICD library, use case library, etc., and refer to the test standard to describe the characteristics and test elements of the language ATML. Classify test case descriptions as standard incentive response commands and use common test software to complete the automated testing process. The automatic test system integrates key test elements such as test data, test strategy and requirements, test steps, test results management, and provides the overall system structure resources, test description, test results, configuration information, public information, etc., and solves a series of problems brought about by manual detection and maintenance.
As a key component of the infrared imaging semi-physical simulation system for airborne optoelectronic products, how to obtain an infrared image closer to the real scene has become the key to the entire infrared imaging system semi-physical simulation system.For infrared dynamic scene projectors, the design of the optical system plays a key role in the imaging fidelity of the infrared simulation scene and target. According to the current usage requirements, this paper designed a medium wave infrared dynamic scene projection system based on DMD. To meet the requirements of the current semi-physical simulation experiments of optoelectronic products, a 1024 × 768 DMD chip was used as the scene modulator.In view of the fact that the dynamic scene projector was to be installed on a turntable, the collimating optical system was designed with a long exit pupil distance and a large exit pupil aperture. The collimating optical system has an exit pupil distance of 600mm, an exit pupil aperture of φ56mm, and a field of view of 6°.The final designed dynamic scene projector could achieve 100Hz dynamic scene generation and could be synchronized externally. The temperature simulation range was -10°C ~ + 300°C, the minimum temperature resolution was 0.1°C, and the gray level was 256. This medium wave dynamic scene projector had been successfully applied to the debugging and testing of several optoelectronic products and semi-physical simulation experiments, which significantly improved the research and development efficiency and shortened the research and development cycle.
Infrared detection distance is a key indicator of infrared search and tracking system. It is generally realized by testing infrared detection sensitivity in the laboratory.The existing infrared detection sensitivity test system uses a single black body configuration, and the target simulation is realized by the point hole target. The background of the target is realized by the target non-transparent area.In actual use, since the target is close to the infrared analog radiation source, the target will gradually become hot as the use time increases, resulting in a smaller radiance temperature difference between the background and the target, which in turn affects the accuracy of the infrared detection sensitivity. Aiming at this situation, this paper designs a dual-black body-based infrared detection sensitivity test system, which achieves the target simulation by the target black body illuminating the spot target, and the background black body illuminates the target to achieve the background simulation. The temperature difference between the target and the black body can be accurately controlled and improved. Infrared detection sensitivity test accuracy.
The maximum ranging distance is a key technical indicator of the pulse laser range finder. It is generally obtained by testing the laser receiving sensitivity of the pulse laser range finder in the laboratory.The existing laser receiving sensitivity test is mainly realized by means of laser analog radiation source and collimating optical system.The laser radiation simulator generally uses a semiconductor laser to transmit the analog laser receiving signal to the focal plane of the collimating optical system through fiber coupling, and then radiates to the receiving aperture of the pulse laser range finder through the collimating optical system. Adjust the intensity of the laser to simulate the energy of the radiation source, and complete the test of the minimum detectable energy, that is, the laser receiving sensitivity.In the actual use process, it is found that the time stability deviation of the radiation power of the semiconductor laser in low-power operation can reach 20%, which is difficult to meet the requirements of use, and after the fiber coupling, the collimation of the collimating optical system, the radiation uniformity is difficult to fulfil requirements.Based on this, this paper designs a pulse laser range finder receiving sensitivity test equipment based on integrating sphere. The system uses the traditional laser radiation analog source plus attenuator to stabilize the laser radiation source.In the case of a pulsed laser range finder as a sensor in combination with a television or infrared sensor, a tungsten halogen lamp is added inside the integrating sphere to provide infrared or television target simulation,then the optical axis of the pulsed laser range finder and collimating optics can be quickly aligned.
Safety test has an important impact on the suspension management system, this paper starts from the top-level requirements of the product under test, according to the functional performance characteristics of the suspension management system, to identify possible factors affecting safety, design-related tests to verify, so as to improve product safety. Based on the definition of weapon security of suspension management system, based on the existing demand analysis model and theoretical methods to extract the top requirements of suspension management system and product safety design requirements, combined with the actual project testing experience, build a suspension management system weapon security demand analysis method, Combined with specific test project analysis of the actual use scenario of the product under test, testers can use this analysis template to quickly identify the key safety-related events in the product under test, form specific test requirements and design test cases.
In order to solve the inconvenience caused by the difference of hardware and software test resources during product testing, realize instrument interchange, meet the rapid change characteristics of test demand and rapid deployment requirements, this paper studies the construction method of a distributed test environment, adopts a fixed general test platform in hardware, and drives Heterogeneous hardware interface standardization technology (middleware technology), isolation module differences, to solve the different manufacturers to the module replacement to bring compatibility problems. Software adopts the design principle of layered software, connecting test elements such as device libraries, ICD libraries, use case libraries, etc. through the use case design layer, resource allocation layer, and hardware environment layer, and through XML between elements Exchange data information, interact with database information via Ethernet, and complete the automatic testing process. Each software runs independently on multiple test devices in the test environment, enabling the automatic execution of corresponding actions or automatically generating the test case software code through XML file.
In this paper, a calibration device for laser target simulator is designed, which is composed of optical aperture, focusing optical system, energy detection unit, time domain detection unit, two-dimensional displacement mechanism, miniature turntable and control software. The calibration device can accurately and quickly calibrate the spectral parameters, frequency parameters, energy parameters of the laser target simulator with 1.064μm . The uncertainty of power stability and uniformity measurement is less than 8%. Thus provides measurement guarantee for laser target simulator.
In modern war, high-speed moving targets such as fighter planes are the key point to reverse the situation of war. Such targets not only move fast, but also stealth performance is getting better and better. By studying the characteristics of high speed moving stealth target, the key technologies of laser defense against high speed moving stealth target are analyzed from the aspects of quantum imaging and quantum detection, and the problems that need to be studied in each technology are pointed out.
The visible light dynamic scene projector is a key component of the visible light imaging hardware-in-the-loop(HWIL) simulation test system.With the Digital Micro-mirror Device (DMD) as the key component, a dynamic visible light imaging simulation system was developed which will be used as the hardware in loop simulation platform for a certain type of airborne visible light imaging system.DMD fundamental operating principle and imaging theory are explained thoroughly. According to required,high-brightness RGB LED, aspheric condenser,light rod,relay lens,TIR lens were used to homogenize the illumination light. The optical projection system was specially designed to solve the large diameter and distance of exit pupil.The paper employed mature solution of DMD driving(TI) to achieve scene input,modulation and reproduce. The dynamic scene projector had been successfully applied to the HWIL simulation system of an airborne visible light imaging system, and had high real-time and fidelity, and met the requirements for use
This paper presents a wave front distortion compensation technique applied to single photon ranging system. The key technologies in the design and the expected results are analyzed, which provides the design basis for the remote detection of the single photon ranging system.
This paper presents a portable infrared/visible composite target simulator design configuration. The system adopts reflective optical design, through the combination of blackbody and visible light source system design and a variety of target plate, it can provide 0.4μm~12μm band simulation target, with parallel difference better than 10″ and 200mm optical aperture. It provides a variety of quasi-direct simulation targets for infrared and visible performance and dynamic tracking test of photoelectric detection equipment.
In this paper, a testing system is introduced to monitor the beam quality of a laser beam propagating over a long distance. The system consists of a large aperture optical system, a high sensitivity receiving system, a fast signal processing circuit and so on. The laser beam quality propagating 10km can be tested, and the two-dimensional energy distribution, pre-mirror energy density, centroid coordinate and other parameters can be obtained.
The infrared dynamic scene projector is a key component of the infrared imaging seeker semi-physical simulation system. Aiming at the long-wave infrared imaging seeker system, the design idea of long-wave infrared dynamic scene projector with IR-CRT as the core device was proposed. The working principle of IR-CRT was introduced. The optical collimation system was designed. The key parameters such as resolution, distortion, simulated temperature range and uniformity were tested. The dynamic scene projector had been successfully applied to infrared imaging seeker. The semi-physical simulation system had verified the static and dynamic tracking performance of the infrared imaging seeker, which met the requirements of product use, and promoted the product development process.
In this paper, an over-top tracking test system for electro-optical detection device is designed, which provides an overtop test environment for electro-optical detection device by using a two-dimensional motion turntable covering the target source of the infrared and visible light bands in a rolling and pitching shafting system. The electro-optical detection device for two-frame configuration provides over-top tracking function and performance testing and verification conditions.
The common methods for measuring the consistency of optical axis of multispectral and multi optical axis optoelectronic system are introduced in detail in this paper. The advantages and disadvantages of various methods are analyzed in detail. For the latest test requirements for the multi optical axis consistency of the current photoelectric system, a set of new test schemes for measuring the consistency of the laser emission axis and the sight axis, ant the laser receiving axis and the sight axis are designed. The device can also test the detection sensitivity and resolution of photoelectric system. The shortcoming of the old scheme, that can not be tested for laser receiving optical axis consistency , is soved. The design results show that the whole testing system meets the development trend of automation and lightweight, possessing extensive application prospect of optical axis consistency testing system.
Proc. SPIE. 10836, 2018 International Conference on Image and Video Processing, and Artificial Intelligence
KEYWORDS: Thermography, Signal to noise ratio, Infrared imaging, Detection and tracking algorithms, Video, Field programmable gate arrays, Infrared radiation, Image enhancement, Video processing, Reconstruction algorithms
Due to that the infrared thermal imaging system has the characteristics of low contrast and small dynamic range, this paper proposed an real-time infrared image enhancement algorithm based on Limit Contrast Adaptive Histogram Equalization (CLAHE) and also provided the algorithm implementation. The algorithm firstly divides the pretreated image data into several sub-regions of size, and then the histogram of the sub-region is calculated respectively, the clipping threshold of histogram is determined according to the image gradient information, the captured pixels are evenly distributed to each gray level. Finally, bi-linear interpolation is used to remove the unbalance effect of block edge transition. Experimental results show that compared with traditional algorithms, this algorithm is capable of suppressing the noise and highlight the edges and details of the image, as well as meeting the real-time requirement.
In this paper, the key technologies of single photon detection in airborne laser ranging are analyzed. Aiming at the engineering application, we propose the next investigation of single photon detection. 1) the compensation of pulse propagation in atmosphere; 2) the problem of ranging accuracy for moving targets; 3) high accuracy optical axis coherence of receiving and transmitting. Further research can improve the airborne adaptability of single photon ranging system.
Target Simulator could simulate Infinity Distance Dynamic Target with Optical Characteristics. It provides simulative target for IRST to test its technical indexes of target detecting on the ground. A scheme of Off-axis RC Target Simulator, which has high resolution and Compact Characteristics. This scheme not only could simulate full wave optical Characteristic target of high resolution, but also Use full aperture Light of Compact optical system. The results show that the focal Length is 800mm, the aperture is 130mm, the length is 290mm,the width is 190mm, the height is 190mm, the modulation transfer function of full wave near diffraction-limited , the distortion is less than 2%,and the weight is less than 10kg.
In the field of airborne photoelectric detection, medium wave imaging lenses with large field of view are mainly used for assistant navigation. A new type of optical system of wide field of view is introduced in this paper. It has compact structure, and could match cooling medium wave IR detector with different F numbers. It is proved that the system could realize the large field of view, image illumination uniformity, low distortion, the same resolution in the whole field of view. The structure of the imaging system introduced in this paper provides a reference for the design of medium wave detection system of large field of view of Variable F number.
In this paper, a performance test system is designed, which is used to produce the difference in temperature between the target and the background, and simulate the infinite infrared targets. The medium-wave imaging system detects infrared target and generates target image. The evaluation of the performance of the medium-wave imaging system is completed by using the standard test method and data processing and analysis of images in the laboratory. The test system, which has the field of view of 30°×30°, the focal length of 34mm, and the distortion is less than 3%, could meet the need of testing the temperature sensitivity, resolution and transfer function of the medium-wave imaging system which the field of view is more than 90°.
Laser echo has an important application in target detection and identification, beam quality analysis and so on. In the paper, a receiver for detecting laser echo signal is designed. Combined with the far field target plate, the facula performance test of photoelectric products can be carried out at the outfield experimental station. The laser echo receiving device mainly includes optical system, photoelectric conversion module, signal processing system, data processing and display control system and so on. The optical focal length of receiver is 1299.99mm, caliber 160mm, and image resolution is 320*256. Finally, the correctness of the laser echo receiver is verified by simulation experiments.
Compared with microwave radar, Laser radar has high resolution, strong anti-interference ability and good hiding ability, so it becomes the focus of laser technology engineering application. A large scale Laser radar cross section (LRCS) measurement system is designed and experimentally tested. First, the boundary conditions are measured and the long range laser echo power is estimated according to the actual requirements. The estimation results show that the echo power is greater than the detector's response power. Secondly, a large scale LRCS measurement system is designed according to the demonstration and estimation. The system mainly consists of laser shaping, beam emitting device, laser echo receiving device and integrated control device. Finally, according to the designed lidar cross section measurement system, the scattering cross section of target is simulated and tested. The simulation results are basically the same as the test results, and the correctness of the system is proved.
In order to improve capability of detection, infrared optical system, in a complex electromagnetic environment, is
required to have high sensitivity and dynamic range. The value of dynamic range shows the range of infrared radiation
detected by infrared optical system. The wider dynamic range of infrared optical system, the more objective information
detected, and this helps to analyze and identify targets more. Based on the definition of dynamic range of infrared optical system, a method of testing and data processing of dynamic range is described in detail. And it is proved to be feasible and suitable for testing the dynamic range of infrared optical system with wide Field of View.
Illumination system is one of the most important parts of the micro-lithography object lens. Its performance can greatly
affect the lithography machine's etching graphic quality. In this paper, we discuss a DUV micro-lithography illumination
system which can achieve high uniformity and a large illuminated area on the mask. According to the large numerical
aperture requirement, a refractive illumination system is designed and optimized with software ZEMAX. The system
also meets the requirement of large illumination area on the mask, and no aspherical lens is used. Characters of different
illumination structures and modes are introduced here. Then by using the software of TracePro, illumination systems
with different kinds of aperture are modeling and illuminaces are analyzed. We research effect of illuminace on the mask
which bring by different kinds of aperture. Also in this paper, we make a study of relationship between different
illumination mode and different kinds of graphics. Finally, we compare the results and give suggestion about how to
choose illumination mode. That is meaningful for choosing different aperture in illumination system of microlithography.
In cryogenic infrared optical system, any inner component of this system above absolute zero will emitt infrared
radiation. These radiation, striking detector surface through transmitting in optical system, makes self-stray radiation of
infrared system. This self-stray radiation is dominant stray radiation in cryogenic infrared system, and it is a key factor of
reducing image quality of cryogenic infrared system. How to suppress self-stray radiation becomes a critical work in the
whole design process of cryogenic infrared system. Take a space remote sensor as an example, distribution change of
self-thermal radiation on the detector surface when the space remote sensor under different temperature, emissivity or
surface state is presented in this paper. Phenomena of self-thermal radiation in optical system is also researched from two
aspects of self-radiation of emitting sources and transmission of thermal radiation in optical system. Consequently,
several key factors of making thermal radiation of detector surface change are found. Therefore, corresponding measures
of suppressing thermal radiation are proposed. And self-stray radiation of cryogenic infrared optical system has been
effectively suppressed and the performance of the space remote sensor has been ensured within its technical requirement.
Cryogenic space remote sensor(CSRS), working on the Sun-synchronous orbit, is used to make observation of deep
space and implement scientific research tasks. To observe small targets in deep space, CSRS should have quite low
noise. Stray light is a major part of noise that affects the imaging quality, therefore, stray light control is a critical part of
CSRS. CSRS is cooled to 10K, and works on the orbit which is never directly illuminated by the Sun and far away from
other radiation sources such as the Earth and the Moon, so stray light from these objects can be neglected. This paper
focuses on stray light from self thermal emissions of CSRS components, which plays a more important role in acquiring
qualified image. Based on the theory of radiation energy transfer in the optical system, a method is proposed to
calculate self thermal emission. After analysis of self thermal emission, measures suppressing stray light are put
forward. Also in the paper, a few simulations to testify the scheme mentioned above are presented. Component
emittance and paint absorbance are measured at various wavelengths as inputs for simulations. The results show that peak value of irradiance is well restricted to meet the system's requirement.