Infrared Target Simulator Research Articles

Optically heated blackbody emitter for dynamic infrared scene generation

The infrared image conversion chip based on optical heating technique has advantages of wide spectral range and high spatial resolution, which is appropriate as an infrared target simulator. At present, the dynamic infrared image, which is physically generated by infrared target simulator, can achieve 8-bit grayscale level with 100 Hz refresh rate. In this paper, we demonstrate an optically heated blackbody emitter (OHBE) for dynamic infrared scene generation to further improve the grayscale level of generated infrared image. The OHBE utilizes the thermal inertness of radiation layer material to integrate the visible light energy, and generates infrared images with 10-bit grayscale value within 1.25 ms. And the infrared images can be collected in a holding time of 3.75 ms in each refresh cycle. The temperature range of the generated infrared image is 108 K, and the temperature resolution corresponds to a unit grayscale value is 0.1 K. The OHBE proposed has been successfully applied to an infrared target simulator.

Research on atmospheric transmission calibration method of infrared target simulator

Research on atmospheric transmission calibration method of infrared target simulator

Design of portable infrared target simulator system

Design of portable infrared target simulator system

Nonuniformity analysis and correction of DMD imaging in infrared target simulation system

Nonuniformity analysis and correction of DMD imaging in infrared target simulation system

Nonuniformity analysis and correction of DMD imaging in infrared target simulation system

基于数字微镜阵列（DMD）的红外目标模拟系统具有高分辨率、高帧率和大温度范围等优点，能够经济、有效地检测和评估红外探测系统的工作性能。为了研究基于DMD的红外目标模拟系统中照明系统的结构设计对成像均匀性的影响并减小像面照度不均匀性，提出了一种消除成像不均匀的方法，对DMD照明系统的结构参数进行了分析和设计，以成像光束截面积之比作为相对照度指标，建立了数学模型，用软件进行数值仿真，得到了能消除因渐晕导致的照度不均匀现象的结构参数和像面各点相对照度分布在88.75%～1；并用TracePro验证了理论分析的结果，得到像面各点相对照度分布在90.91%～1，与理论分析结果相符，证明了在DMD照明系统结构参数设计合理的情况下，该方法可以有效降低因渐晕导致的像面照度不均匀性，为红外目标模拟系统结构参数的设计和像面照度分析提供了参考。

Infrared Target Generator Development Technology

The integration of air and space and information warfare has become the main development trend of future military battlefields. Infrared target simulation technology is the key supporting technology for space-based infrared early warning system and photoelectric imaging precision guidance system research, which can provide basis for its research and development and upgrade. Technical Support. This paper introduces the domestic and international development of the infrared target scene generator of the core component of infrared target simulation technology.

基于生成对抗式神经网络的红外目标仿真方法

基于生成对抗式神经网络的红外目标仿真方法

红外目标模拟器动态校准系统光学系统设计

红外目标模拟器动态校准系统光学系统设计

Research on calibration method of relative infrared radiometer.

The Relative Infrared Radiometer (RIR) is commonly used to measure the irradiance of the Infrared Target Simulator (ITS), and the calibration of the RIR is central for the measurement accuracy. RIR calibration is conventionally performed using the Radiance Based (RB) calibration method or Irradiance Based (IB) calibration method, and the relationship between the radiation of standard source and the response of RIR is determined by curve fitting. One limitation existing in the calibration of RIR is the undesirable calibration voltage fluctuation in single measurement or in the reproducibility measurement, which reduces the calibration reproducibility and irradiance measurement accuracy. To address this limitation, the Equivalent Blackbody Temperature Based (EBTB) calibration method is proposed for the calibration of RIR. The purpose of this study is to compare the proposed EBTB calibration method with conventional RB and IB calibration methods. The comparison and experiment results have shown that the EBTB calibration method is not only able to provide comparable correlation between radiation and response to other calibration methods (IB and RB) in the irradiance measurement but also reduces the influence of calibration voltage fluctuation on the irradiance measurement result, which improves the calibration reproducibility and irradiance measurement accuracy.

大口径高变倍比红外目标模拟系统的设计

大口径高变倍比红外目标模拟系统的设计

红外目标模拟器光学系统设计

红外目标模拟器光学系统设计

红外目标模拟器消热差光学系统设计

红外目标模拟器消热差光学系统设计

便携式红外目标模拟器的研制

便携式红外目标模拟器的研制

Optical Projection System Design of the Infrared Dynamic Scene Simulator Based on DMD

Infrared dynamic target simulator can simulate infrared scene practicality in the laboratory, and reduce the research cost of the optical electrical system and offer recycle experiment environments， which are used to evaluate and test the infrared imaging system performance. Infrared scene projection technology based on the digital micro-mirror device (DMD) has been developed and applied to infrared target simulator, whose infrared images were obtained by modulating the launch of infrared radiation. Compared with the traditional simulator, the infrared scene simulator based on digital micro-mirror device (DMD) has a high spatial resolution and high frame rate, no dead pixels and good uniformity of characteristics. Firstly, the basic structure and the principle of the digital-mirror device are briefly introduced, and the kind and the advantage of the DLP(Digital Light Procession) system based on digital micro-mirror device (DMD) are analyzed. The key technology of the DLP(Digital Light Procession) projection system when it used in infrared wave band is analyzed. Secondly, the design process of the projection system is detailed. According to the design index required and the size of the digital micro-mirror device (DMD), a projection system consisting of three lenses and the transmissive type and aspheric technology was designed by ZEMAX optical-design software. The work wave-band is 8～12μm.The MTF curve is close to the diffraction limited curve and the size of the spot diagram is smaller than the airy disk. The result indicates that the system satisfies the design requirement and the structure of system is good.

双向大视场消畸变低温红外目标模拟光学系统设计

To overcome the shortcomings of off-axis Three Mirror Anastigmatic(TMA) optical systems in larger sagittally FOVs and smaller meridionally FOVs,this paper designs a bidirectional TMA optical system for cryogenic infrared target simulation system based on the symmetric rule of optical system.Both the sagittally and meridionally FOVs are 5°,the larger FOV optical system at 3-5 μm has a focal length of 400 mm and a F number of 8.By using the structural parameters of the optical system and the non-spherical coefficients of the mirrors to adjust and correct the eccentric and tilt of the three-mirror and to eliminate distortion and other aberrations,the system shows that the MTF is better than 0.71 at 6.5 lp/mm,the aberration of the whole FOV is λ/250(RMS) and the maximum radius of diffuse point is less than 7.0 μm(RMS),which achieves diffraction limit.Moreover,the maximum distortion in the whole FOV is less than 0.04%.Finally,it proves that the optical system has good imaging quality both in the visible and infrared spectral regions.

Upgrading optics test capabilities for modern weapon systems

The terms obsolete and obsolescence are heard in almost every industry today. For suppliers and users of test systems facing product obsolescence, these terms represent both opportunities and challenges depending upon one's perspective. For manufacturers of replacement items, it represents new business possibilities, and for those maintaining the systems, it can mean investment and expense. By offering replacement solutions for obsolete instrumentation, the life of test systems can be cost-effectively extended. This paper presents the requirements and features associated with the development of an Infrared Target Simulator utilized by the Air Force to test IR (InfraRed) Seekers at the O-level, Depot, and I- level. The present legacy test simulator was a stand-alone, bulky, off axis design that became no longer producible or repairable due to obsolete hardware. The legacy system was also designed and manufactured at a time when modularity was not a consideration - a key feature for new modern systems which allows the production of new modules using current technology hardware and facilitating upgrades, extending the legacy test unit's service life.

A resistor matrix simulating a dynamic infrared target

A number of infrared target simulation methods are presented and a new method is proposed. The proposed method is based on printing a large number of miniature-size resistors in a resistor matrix. Access to each resistor is obtained by selecting the appropriate row and column of the matrix. Application of a potential difference to a resistor raises its temperature and infrared energy is emitted. Owing to the small physical size of the resistors, they have appreciable thermal dynamics, i.e. their heat-up and cooling times are of the order of 40 msec. As a result, it is possible to obtain effects of target movement or changes in target dimensions by switching groups of appropriate resistors on and off. The system is controlled by a micro-computer. The target can be moved either by hand or along programmed pathways. Its thermal image can be projected by means of an appropriate optical system onto a thermal image camera.