Multispectral and polarization cameras that can simultaneously acquire the spatial,spectral,and polarization characteristics of an object have considerable potential applications in target detection,biomedical imaging...Multispectral and polarization cameras that can simultaneously acquire the spatial,spectral,and polarization characteristics of an object have considerable potential applications in target detection,biomedical imaging,and remote sensing.In this work,we develop a common-aperture optical system that can capture multispectral and polarization information.An off-axis three-mirror optical system is mounted on the front end of the proposed system and used as a common-aperture telescope in the visible light(400 nm-750 nm)and long-wave infrared(LWIR,8μm-12μm)waveband.The system can maintain a wide field of view(4.5°)and it can demonstrate an enhanced identification ability.The off-axis three-mirror system gets rid of central obscuration while further yielding stable system resolution and energy.Light that has passed through the front-end common-aperture reflection system is divided into the visible light and LWIR waveband by a beamsplitter.The two wavebands then converge on two detectors through two groups of lenses.Our simulation results indicate that the proposed system can obtain clear images in each waveband to meet the diverse imaging requirements.展开更多
梳理分析了软件通信体系架构(software defined radio,SCA)最新发展现状并设计了典型通用架构,研究了SCA的技术体制,总结了SCA技术体制中的规范特点和主要优势;对SCA的关键技术和标准演进进行了详细分析;给出了SCA的设计思路,并基于SCA...梳理分析了软件通信体系架构(software defined radio,SCA)最新发展现状并设计了典型通用架构,研究了SCA的技术体制,总结了SCA技术体制中的规范特点和主要优势;对SCA的关键技术和标准演进进行了详细分析;给出了SCA的设计思路,并基于SCA标准设计了典型软件无线电平台的通用架构,主要包括硬件平台、通用软件平台和波形组件,并给出基于该典型通用架构的设计实例。通过对SCA发展研究及相关典型通用架构设计,能够为新型软无电台设计提供相关研究成果和参考依据,推进新体制软件无线电电台跨越式发展。展开更多
基金Project supported by the National Natural Science Foundation of china(Grant No.61471039)
文摘Multispectral and polarization cameras that can simultaneously acquire the spatial,spectral,and polarization characteristics of an object have considerable potential applications in target detection,biomedical imaging,and remote sensing.In this work,we develop a common-aperture optical system that can capture multispectral and polarization information.An off-axis three-mirror optical system is mounted on the front end of the proposed system and used as a common-aperture telescope in the visible light(400 nm-750 nm)and long-wave infrared(LWIR,8μm-12μm)waveband.The system can maintain a wide field of view(4.5°)and it can demonstrate an enhanced identification ability.The off-axis three-mirror system gets rid of central obscuration while further yielding stable system resolution and energy.Light that has passed through the front-end common-aperture reflection system is divided into the visible light and LWIR waveband by a beamsplitter.The two wavebands then converge on two detectors through two groups of lenses.Our simulation results indicate that the proposed system can obtain clear images in each waveband to meet the diverse imaging requirements.
文摘梳理分析了软件通信体系架构(software defined radio,SCA)最新发展现状并设计了典型通用架构,研究了SCA的技术体制,总结了SCA技术体制中的规范特点和主要优势;对SCA的关键技术和标准演进进行了详细分析;给出了SCA的设计思路,并基于SCA标准设计了典型软件无线电平台的通用架构,主要包括硬件平台、通用软件平台和波形组件,并给出基于该典型通用架构的设计实例。通过对SCA发展研究及相关典型通用架构设计,能够为新型软无电台设计提供相关研究成果和参考依据,推进新体制软件无线电电台跨越式发展。
