An improved scheme for passive synthetic aperture imaging is proposed. With this new technique,the radiation signal from field of view (FOV) is received and its frequency is down-converted to intermediate frequency (I...An improved scheme for passive synthetic aperture imaging is proposed. With this new technique,the radiation signal from field of view (FOV) is received and its frequency is down-converted to intermediate frequency (IF). The IF signals are modulated to light-wave by electro-optical phase modulators and transmitted in fiber. At the end of the fiber,a downscaled fiber array is formed according to the receiver array. The image of FOV is obtained with the fiber array. The principles of passive synthetic aperture photonic imaging technique are analyzed deeply and its properties are compared with traditional imaging method of synthetic aperture. By simulation,the spread function of spot source and the image signal-noise-ratio are investigated using the new imaging approach with FOV radiation from different incidence angles. The introduced scheme can reconstruct the target image and perfect the present synthetic aperture imaging systems.展开更多
基金supported by the National "863 Program" of China (No. 2007AA12Z114)
文摘An improved scheme for passive synthetic aperture imaging is proposed. With this new technique,the radiation signal from field of view (FOV) is received and its frequency is down-converted to intermediate frequency (IF). The IF signals are modulated to light-wave by electro-optical phase modulators and transmitted in fiber. At the end of the fiber,a downscaled fiber array is formed according to the receiver array. The image of FOV is obtained with the fiber array. The principles of passive synthetic aperture photonic imaging technique are analyzed deeply and its properties are compared with traditional imaging method of synthetic aperture. By simulation,the spread function of spot source and the image signal-noise-ratio are investigated using the new imaging approach with FOV radiation from different incidence angles. The introduced scheme can reconstruct the target image and perfect the present synthetic aperture imaging systems.
