• Chinese Optics Letters
  • Vol. 13, Issue 9, 091001 (2015)
Ning Zhang, Zhiyong Lu, Jianfeng Sun*, Yu Zhou, Zhu Luan, Zhiwei Sun, Gunagyuan Li, and Liren Liu
Author Affiliations
  • Key Laboratory of Space Laser Communication and Detection Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
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    Abstract

    We present a tabletop-scale spotlight-mode down-looking synthetic aperture imaging ladar (DL SAIL) demonstrator, which is performed by a collimator with 10 m focal length to simulate the far-field optical field. A specular-point target and a diffuse-reflection target have been used for resolution analysis and 2D imaging, respectively. The experimental result is in agreement with the theoretical design. The experiment setup is capable of simulating a real application scenario for further study. This Letter is focused on the proposition and implementation of spotlight-mode DL SAIL.
    Ein,H(x,y:tf,ts)=E0rect(tfTf)rect(xWx)rect(yM)×exp(jπλfy(xvxtfSb)2),(1a)

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    Ein,V(x,y:tf,ts)=E0rect(tfTf)rect(xWx)rect(yM)×exp(jπλfy(x+vxtfSb)2)exp(jπjλfy(yvyts)2),(1b)

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    ib(xp,yp:tf,ts)=Krect(tfTf)rect(xpMWx)rect(ypMvytsvtsMWy)×2cos(2π2vx(xp+MSb)MλfxtfπM2λfy(ypMvytsvts)2).(2)

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    IxC(xp,yp:x,y)=Krect(xpMWx)exp(jπM2λfy(yyp)2)×sinc(2vxTfMλfx(x+MSb),WyMλfyy)**δ(xxp,yyp),(3)

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    dx=MλfxvxTf.(4)

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    dy=2MλfyWy.(5)

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    vxOutvyOut=NPxkfPlyDxDy.(6)

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    vyOutv=PlyPsy.(7)

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    Copy Citation Text
    Ning Zhang, Zhiyong Lu, Jianfeng Sun, Yu Zhou, Zhu Luan, Zhiwei Sun, Gunagyuan Li, Liren Liu. Laboratory demonstration of spotlight-mode down-looking synthetic aperture imaging ladar[J]. Chinese Optics Letters, 2015, 13(9): 091001
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    Category: Image processing
    Received: Feb. 11, 2015
    Accepted: Jun. 8, 2015
    Posted: Jan. 23, 2019
    Published Online: Sep. 14, 2018
    The Author Email: Jianfeng Sun (sunjianfengs@163.com)