In order to avoid the effect of photon defect on the imaging during X-ray generation,an imaging integral filter based on quantum enhancement was proposed in this paper to effectively reduce the sensitivity of X-ray de...In order to avoid the effect of photon defect on the imaging during X-ray generation,an imaging integral filter based on quantum enhancement was proposed in this paper to effectively reduce the sensitivity of X-ray detection system for quantum noise.Firstly,the coupling constraint at the end of the image intensifier was analyzed by discussing the X-ray imaging mechanism.The effects of quantum thermal noise and defects on spectrum transfer were studied from the micro perspective.Then the effectiveness of the new integral filter method was verified from the view of the integral effect of fundamental space frequency transfer characteristics in Fourier spectrum.Finally,the superior ity and real-time performance of the quantum enhancement filter method were verified by the comparison filter testing.展开更多
At present, there has been great progress in the field of the point-to-point laser communication technology, in other words, the traditional laser communication technology has been advanced day by day. Furthermore, in...At present, there has been great progress in the field of the point-to-point laser communication technology, in other words, the traditional laser communication technology has been advanced day by day. Furthermore, in order to search for an effective means of achieving localized laser broadcasting communication within a limited range, an effective method of horizontal link laser broadcasting communication is presented, and the corresponding verifiable broadcast communication system is designed. In addition, the laser broadcasting is systematically studied by one physical model built at the optimal distribution of optical power. First of all, the theoretical model of laser beam expansion and the theoretical model of parallel light curtain are made comparisons and analyzed from the angle of attenuation of optical power, and the optical power loss model of the parallel light curtain is established as a result. Secondly, combined with the theory of optical imaging transformation based on Gaussian beam, the field distribution of far field of parallel light curtain is simulated by one leading optical and illumination design software and the relation between the filed distribution of far field of light curtain and the distance of transmission is revealed. Finally, the superiority and feasibility of the parallel light curtain theory model are verified by field communication experiments in different information channels.展开更多
基金This work has been supported by the National Natural Science Foundation of China(Nos.61905026 and 11874091)the Jilin Province Science and Technology Development Project(Nos.20180519019JH,20180804009HJ and 20190701024GH)+2 种基金the Jilin Province Industrial Innovation Special Fund Project(Nos.2018C040-3 and 2019C043-6)the Development of Key Laboratory of Astronomical Optics Technology,Chinese Academy of Sciences(No.CAS-KLAOTKF201803)the Changchun University of Science and Technology(No.XJJLG-2017-01).
文摘In order to avoid the effect of photon defect on the imaging during X-ray generation,an imaging integral filter based on quantum enhancement was proposed in this paper to effectively reduce the sensitivity of X-ray detection system for quantum noise.Firstly,the coupling constraint at the end of the image intensifier was analyzed by discussing the X-ray imaging mechanism.The effects of quantum thermal noise and defects on spectrum transfer were studied from the micro perspective.Then the effectiveness of the new integral filter method was verified from the view of the integral effect of fundamental space frequency transfer characteristics in Fourier spectrum.Finally,the superior ity and real-time performance of the quantum enhancement filter method were verified by the comparison filter testing.
基金supported by the National Natural Science Foundation of China(Nos.51602028,11603050 and 11874091)the Natural Science Foundation of Jilin Province(Nos.20150204049GX,20150204083GX,20180519019JH,2018C040-3,JJKH20170602KJ and20160520114JH)Natural Science Foundation of Changchun University of Science and Technology(No.XJJLG-2017-01)
文摘At present, there has been great progress in the field of the point-to-point laser communication technology, in other words, the traditional laser communication technology has been advanced day by day. Furthermore, in order to search for an effective means of achieving localized laser broadcasting communication within a limited range, an effective method of horizontal link laser broadcasting communication is presented, and the corresponding verifiable broadcast communication system is designed. In addition, the laser broadcasting is systematically studied by one physical model built at the optimal distribution of optical power. First of all, the theoretical model of laser beam expansion and the theoretical model of parallel light curtain are made comparisons and analyzed from the angle of attenuation of optical power, and the optical power loss model of the parallel light curtain is established as a result. Secondly, combined with the theory of optical imaging transformation based on Gaussian beam, the field distribution of far field of parallel light curtain is simulated by one leading optical and illumination design software and the relation between the filed distribution of far field of light curtain and the distance of transmission is revealed. Finally, the superiority and feasibility of the parallel light curtain theory model are verified by field communication experiments in different information channels.
