光学学报, 2018, 38 (9): 0911003, 网络出版: 2019-05-09
基于散斑照明的成像分辨率研究 
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Research on Imaging Resolution via Speckle Illumination
图 & 表
图 2. D=4 mm时物面处散斑的横向相干长度大小与成像分辨率的关系。(a)传统非相干成像和相干成像结果;(b)一阶自相关成像结果
Fig. 2. Relationship between the transverse coherence length of speckle on object plane and the imaging resolution with D=4 mm. (a) Result of traditional incoherent imaging and coherent imaging;(b) result of first order autocorrelation imaging
图 3. D=4mm时,物面处散斑横向相干长度大小对成像分辨率影响的数值模拟结果。(a1)原始物体;(a2)传统非相干成像结果;(a3)传统相干成像结果;(b1)~(b5)不同的横向相干长度下一阶自相关成像的结果(散斑照明帧数N=2000,lc分别为10,30,50,80,300 μm);(c1)对应a1,a2和b1的横截面图比较;(c2)对应a1,b1~b3和b4的横截面图比较;(c3)对应a1,a3,b4和b5的横截面图比较
Fig. 3. Numerical Simulation results in the transverse coherence length of speckle on object plane on the imaging resolution with D=4mm. (a1) Original object; (a2) result of traditional incoherent imaging; (a3) result of traditional coherent imaging; (b1)-(b5) results of first order autocorrelation imaging with different transverse coherence lengths (frame number N is 2000 and lc is 10, 30, 50, 80, 300 μm, respectively); (c1) comparison of cross-sectional view of a1, a2 and b1; (c2) comparison of cross-
图 4. 当lc=33 μm时, 成像系统的数值孔径与成像分辨率的关系。(a)传统非相干成像结果; (b)传统相干成像结果; (c)一阶自相关成像结果; (d)强度涨落二阶自相关成像结果
Fig. 4. Relationship between the numerical aperture of the imaging system and the imaging resolution with lc=33 μm. (a) Result of traditional incoherent imaging; (b) result of traditional coherent imaging (c) result of first order autocorrelation imaging; (d) result of second-order autocorrelation imaging of intensity fluctuation
图 5. 当lc=33 μm时, 成像系统的数值孔径对成像分辨率影响的数值模拟结果。(a1)~(a4)传统非相干成像结果;(b1)~(b4)一阶自相关成像结果;(c1)~(c4)强度涨落二阶自相关成像结果(D分别为4.0,3.4,3.1,2.9 mm);(d1)~(d4)对应于不同D下,物体和三种成像方式的成像结果的横截面比较
Fig. 5. Numerical simulation results of the numerical aperture of the imaging system on the imaging resolution with lc=33 μm. (a1)-(a4) Results of traditional incoherent imaging; (b1)-(b4) results of first order autocorrelation imaging;(c1)-(c4) results of second-order autocorrelation imaging of intensity fluctuation (D is 4.0, 3.4, 3.1, 2.9 mm, respectively);(d1)-(d4) comparison of the cross-sectional view of three different imaging methods with different D values
王鹏威, 龚文林. 基于散斑照明的成像分辨率研究[J]. 光学学报, 2018, 38(9): 0911003. Pengwei Wang, Wenlin Gong. Research on Imaging Resolution via Speckle Illumination[J]. Acta Optica Sinica, 2018, 38(9): 0911003.
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