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浏览/检索结果: 共4条，第1-4条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Enhanced Phase Retrieval Method Based on Random Phase Modulation 期刊论文 Applied Sciences-Basel, 2020, 卷号: 10, 期号: 3, 页码: 10031184-1-11 作者:  Li, Fanxing;  Yan, Wei;  Peng, Fupin;  Wang, Simo;  Du, Jialin 收藏  |  浏览/下载：24/0  |  提交时间：2021/05/11 Random Phase Modulation  Phase Retrieval  Spatial Light Modulator   Fast Optical Phased Array Calibration Technique for Random Phase Modulation LiDAR 期刊论文 IEEE PHOTONICS JOURNAL, 2019, 卷号: 11 作者:  Li, Li-Jing;  Chen, Wen;  Zhao, Xin-Yu;  Sun, Ming-Jie 收藏  |  浏览/下载：4/0  |  提交时间：2019/12/30 Calibration  optical phased array  point spread function  random phase modulation   Modulation transfer function measurement of sampled imaging systems in field test (EI CONFERENCE) 会议论文 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, April 26, 2010 - April 29, 2010, Dalian, China Yang L.; Sun Q.; Wang J.; Zhang J. 收藏  |  浏览/下载：15/0  |  提交时间：2013/03/25 A digital mirror device (DMD) based light projector was developed as the target generator in modulation transfer function (MTF) measurement. In order to overcome the sampling-scene phase effect in MTF measurement of sampled imaging systems  a method using random targets is introduced to yield a phase-averaged MTF. The main potential problem of implementing this method is the fact that the stationary assumption of the random targets may be vitiated in practical measurement  especially in field test due to the ill condition. We provide an efficient model-independent way of analyzing and isolating the spectral contents arising from these additional contributions to MTF measurement. Algorithms with adaptive parameter selection were also developed for spectral estimation of the test image in order to overcome the challenge brought by the size limit of the test matrices for one certain field of view derived from the isoplantic region. The MTF measurement of a CCD video imager is used to demonstrate the measurement technique and illustrate the benefits over other methods. In order to validate the results  comparisons have been made between MTF measurements of imager implemented using this method and bar target direct measurements. 2010 Copyright SPIE - The International Society for Optical Engineering.   精准激光频率相位控制技术研究 学位论文 作者:  陈泽恒 收藏  |  浏览/下载：16/0  |  提交时间：2018/12/26 激光相频控制，频率调制光谱稳频技术，光学锁相环技术，伪随机码测距，光纤时频传递  Laser frequency&phase control, Frequency modulation spectroscopy, Optical phase-locked loop, Pseudo-random ranging, Fiber-optic joint time and frequency transfer