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Experimental study on interference threshold of HgCdTe refrigeration gaze thermal imager in medium wave by pulse laser
Published in Khaled Habib, Elfed Lewis, Frontier Research and Innovation in Optoelectronics Technology and Industry, 2018
X.Z. Cheng, M. Shao, X.K. Miao, Z.F. Hou, B. Bai, L.L. Zhang
With the rapid development of optoelectronic technology, various types of photo detectors and photoelectric targeting devices have emerged in an endless stream, which have greatly expanded the scope of human vision, and have been widely used in military surveillance such as reconnaissance and early warning, satellite remote sensing, imaging observation, precision guidance, and range measurement (Shi Wenyuan and Dong Liang, 2015; Zhao Xinyu, Qiao Yanfeng, Guo Xiaohai, 2012). Infrared imaging technology has long been a breakthrough in military applications as a night vision equipment, and has been used for search, tracking, guidance and other fields (Che Jinxi and Wang Dong, 2011; Yang Aifen, Zhang Jia and Li Gang, 2015). As an effective means of photoelectric countermeasures, the research on the interference and damage mechanism of laser to infrared imaging system has increasingly attracted the attention of the military of all countries (Chen Zhaobing, Cao Lihua and Wang Bing, 2013). At present, there are few studies on the interference of HgCdTe refrigeration gaze thermal imager in medium wave by pulse laser and it is necessary to carry out the research. In this paper, a laser with a wavelength of 3 μm–5 μm, a repeat frequency of 3 kHz, and a pulse width of 82 ns was used as the interference source to irradiate the HgCdTe refrigeration gaze thermal imager in medium wave. The interference threshold and the mathematical relationship between the number of saturated pixels and the laser power density are obtained.
Why Human Enhancement is Necessary for Successful Human Deep-space Missions
Published in The New Bioethics, 2019
Konrad Szocik, Martin Braddock
Ionizing radiation is harmful for the human body because it easily penetrates the shielding materials of spacecraft. Shielding strategies are highly insufficient to protect against GCR and passive shielding strategies include uniform shielding for the entire spacecraft, safe shelter inside the habitat and generation of a microshelter (Vuolo et al. 2017). Special (micro)shelters supported by early warning satellite system are necessary in interplanetary spacecraft due to unpredictable short radiation events like solar flares or SPE (Space Radiation).