中国激光, 2014, 41 (2): 0209020, 网络出版: 2014-01-21
太赫兹Gabor同轴数字全息记录距离实验研究
Experimental Investigation on Recording Distance of Terahertz Gabor in-Line Digital Holography
成像系统 太赫兹成像 数字全息 横向分辨率 记录距离 imaging systems terahertz imaging digital holography lateral resolution recording distance
摘要
太赫兹Gabor同轴数字全息系统具有分辨率高和结构紧凑等特点,有潜在的应用前景。由于其系统横向分辨率与记录距离有关,因此研究实际成像系统中记录距离对成像结果的影响具有重要的应用价值。利用自制的分辨率分别为0.4 mm和0.6 mm的目标,进行了不同记录距离的2.52 THz Gabor同轴全息成像实验,并通过角谱法实现数字再现。对再现像进行了对比分析,实验结果接近横向分辨率随记录距离变化的理论计算结果。
Abstract
Terahertz Gabor in-line digital holographic system has the characteristics of high resolution and compact structure, and it has potential application prospects. The lateral resolution of the system is related to the recording distance, so the research on the effect of recording distance on imaging results in actual imaging system has important application values. By using self-made targets with resolutions of 0.4 mm and 0.6 mm, 2.52 THz Gabor in-line holography imaging experiments with different recording distances are carried out and digital reconstructions are realized by angular-spectrum representation. The reconstructed images are compared and analyzed, and experimental results are close to the theoretical calculation results of the lateral resolution changing with the recording distance.
李琦, 胡佳琦. 太赫兹Gabor同轴数字全息记录距离实验研究[J]. 中国激光, 2014, 41(2): 0209020. Li Qi, Hu Jiaqi. Experimental Investigation on Recording Distance of Terahertz Gabor in-Line Digital Holography[J]. Chinese Journal of Lasers, 2014, 41(2): 0209020.