Data from soft X-ray telescope can provide the basis for revealing some extreme physical laws and phenomenon. So, X-ray telescope is a kind of important equipment for space science observation. Soft X-ray optical system is the core component of X-ray telescope system, and according to its influence on X-ray, the optical system is divided into three categorys: collimating type, focusing type and modulating type. By introducing the working principle, performance characteristics, preparation technology and application status of the three optical system at home and abroad.The three important development trends about the space X-ray detection load technology is made: optical system miniaturization and lightweight; easily of array integration; multi-dimensional information of X ray photon is extracted. This analysis will give powerful guide for design of the soft X-ray optical detector in the future.
KEYWORDS: Pulsars, Sensors, X-rays, Signal to noise ratio, X-ray detectors, Monte Carlo methods, Navigation systems, Energy efficiency, Signal detection, Photodetectors
Detection sensitivity is an important indicator of the X-ray pulsar detector. In order to achieve the accuratesensitivity of the detector, a new method of calculate detection sensitivity is proposed calculation. Combining with the characteristics of X-ray pulsar radiation spectrum and detector spectral,classic pulse accumulation model is corrected.A new signal to noise ratio (SNR) calculation formula is deduced by using the new pulse accumulation model.Constructing a new variable Z, which has close relationship with SNR. Through setting the SNR, the analysis and simulation verification for detection sensitivity and confidence level can be made.Simulation verification shows that the monte carlo simulation result is consistent with the theoretical results, and the maximum deviation is only 5%, which is far less than the deviation caused by the space environmentdisturbance.
The paper reviews the relevant development status of domestic and international solar blind ultraviolet and infrared warning, According to current application demands for the payload of the missiles warning in the near-space, this paper presents a dual-band early warning system, which covers the solar blind ultraviolet (250nm-280nm) and MWIR (3000-5000nm). The system uses dual-band to achieve military missile detection and warning, which can effectively reduce the false alarm rate. The optical system uses a four off-axis system as the main anti-optical systems and the splitter was introduced to realize on two spectral bands. According to the detector and the corresponding application needs two-band optical system, this paper completed the calculations and optical system design. After the design is complete, MTF two bands of the optical system in the Nyquist frequency are: solar blind ultraviolet MTF>0.8@39lp/mm, MWIR MTF>0.7@39lp/mm, The maximum RMS spot diameter of two optical systems are smaller than the size of a detector, The single energy cell concentration is greater than 80%.
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