光学学报, 2019, 39 (5): 0509001, 网络出版: 2019-05-10
毫米波全息成像中的部分发育散斑模型 
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Partially Developed Speckle Model for Millimeter-Wave Holographic Imaging
图 & 表
图 1. 等效“散射中心”个数N、散斑对比度C与相位标准差σ?的关系。(a) C与σ?的关系;(b) C与N的关系
Fig. 1. Relationship among number of equivalent scattering centers N, speckle contrast C, and phase standard variation σ?. (a) C versus σ?; (b) C versus N
图 2. 随机粗糙面毫米波全息成像示意图
Fig. 2. Schematic of millimeter-wave holographic imaging for random rough surface
图 3. 等效“散射中心”个数N与相关长度l的关系(k是常数)
Fig. 3. Relationship between number of equivalent scattering centers N and correlation length l (k is constant)
图 4. L=4λ时散斑对比度C与高斯粗糙面均方根高度δ和相关长度l的关系。(a)在不同kl下,C随kδ的变化曲线;(b)在不同kδ下,C随kl的变化曲线
Fig. 4. Relationship among speckle contrast C, root mean square height δ of Gaussian rough surface, and correlation length l when L=4λ. (a) C versus kδ for various values of kl; (b) C versus kl for various values of kδ
图 5. 分辨率L对散斑对比度C的影响。(a) kl=10;(b) kδ=1
Fig. 5. Influence of resolution L on speckle contrast C. (a) kl=10; (b) kδ=1
图 6. 随机粗糙面成像模拟生成的散斑图样的一次成像结果(kδ=0.8,L≈2.51λ)。(a) l=0.15λ;(b) l=λ;(c) l=2.5λ
Fig. 6. One imaging result of speckle pattern generated by random rough surface imaging simulation (kδ=0.8,L≈2.51λ). (a) l=0.15λ; (b) l=λ; (c) l=2.5λ
表 1毫米波全息成像仿真参数设置
Table1. Simulation parameter setting for millimeter wave holographic imaging
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经文, 江舸, 成彬彬, 张健. 毫米波全息成像中的部分发育散斑模型[J]. 光学学报, 2019, 39(5): 0509001. Wen Jing, Ge Jiang, Binbin Cheng, Jian Zhang. Partially Developed Speckle Model for Millimeter-Wave Holographic Imaging[J]. Acta Optica Sinica, 2019, 39(5): 0509001.
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