中国激光, 2018, 45 (8): 0804007, 网络出版: 2018-08-21
基于三步相移干涉法的光学传输矩阵测量与聚焦 
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Measuring Optical Transmission Matrix Based on Three Steps Phase Shift Interferometry and Focusing
图 & 表
图 1. 哈达玛基与笛卡尔基调制方式的对比。(a)笛卡尔基,灰色像素表示不反射光束信息,值为0,白色像素表示反射光束信息,值为1;(b)哈达玛基,灰色像素和白色像素均能反射光束信息,灰色像素的值为-1,白色像素的值为1,且灰色像素的相位滞后白色像素π
Fig. 1. Comparison between modulation in Hadamard basis and Cartesian basis. (a) Cartesian basis, gray is not reflection pixel, equals to 0, white is reflection pixel, equals to 1; (b) Hadamard basis, gray and white are both reflection pixels, gray equals to -1 and white equals to 1, phase lag of gray is π comparing to white
图 2. 基于光学传输矩阵透过散射介质的聚焦原理图
Fig. 2. Schematic of focusing through scattering medium based on OTM
图 3. 随机散射介质的光学传输矩阵测量系统。(a)测量矩阵及聚焦光学原理;(b)测量矩阵及聚焦实验装置实物图
Fig. 3. OTM measuring system of scattering medium. (a) Optical schematic of measuring matrix and focusing; (b) experimental devices of measuring matrix and focusing
图 4. 磨砂玻璃在哈达玛基与笛卡尔基下光学传输矩阵的实部和虚部的直方图分布与曲线拟合结果。(a) KH与KD的虚部;(b) KH与KD的实部
Fig. 4. Histogram distributions and fitting results of real part and imaginary part of OTM of frosted glass at Hadamard basis and Cartesian basis. (a) Imaginary part of KH and KD; (b) real part of KH and KD
图 5. 单点聚焦实验结果。(a)单点聚焦目标;(b)相机探测得到的散斑;(c)单点聚焦结果
Fig. 5. Single point focusing. (a) Single point focusing goal; (b) speckle detected by camera; (c) focusing result of single point
图 6. 多点聚焦实验结果。(a)两点聚焦目标;(b)两点聚焦时相机探测得到的散斑;(c)两点聚焦结果;(d)三点聚焦目标;(e)三点聚焦时相机探测得到的散斑;(f)三点聚焦结果
Fig. 6. Multipoint focusing. (a) Two points focusing goal; (b) speckle detected by camera with two points focusing; (c) focusing result of two points; (d) three points focusing goal; (e) speckle detected by camera with three points focusing; (f) focusing result of three points
图 7. 基于光学传输矩阵实现不同条件下单点聚焦时的增强因子。(a)不同聚焦位置;(b)不同相机位置
Fig. 7. Enhancement factors of single point focusing under different conditions based on OTM. (a) Different focusing positions; (b) different camera positions
王剑南, 李伟, 刘杰涛, 孙雪莹, 郭成飞, 邵晓鹏. 基于三步相移干涉法的光学传输矩阵测量与聚焦[J]. 中国激光, 2018, 45(8): 0804007. Wang Jiannan, Li Wei, Liu Jietao, Sun Xueying, Guo Chengfei, Shao Xiaopeng. Measuring Optical Transmission Matrix Based on Three Steps Phase Shift Interferometry and Focusing[J]. Chinese Journal of Lasers, 2018, 45(8): 0804007.
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