中国科学院机构知识库网格
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用于数字等温扩增系统的荧光图像分析技术 期刊论文  OAI收割
中国医学物理学杂志, 2020, 卷号: 37
作者:  
徐静;  汪磊;  赵俊;  花昌义;  朱灵
  |  收藏  |  浏览/下载:55/0  |  提交时间:2021/11/29
An improved infrared image enhancement algorithm based on multi-scale decomposition 会议论文  OAI收割
International Symposium on Optoelectronic Technology and Application 2014, Beijing, China, May 13-15, 2014
作者:  
Zhang HH(张红辉);  Luo HB(罗海波);  Yu XR(余新荣);  Ding QH(丁庆海)
收藏  |  浏览/下载:46/0  |  提交时间:2014/12/29
Ultrasensitive detection of amplified spontaneous emission at 710 nm by means of picosecond collinear optical parametric amplification near degeneracy 期刊论文  OAI收割
APPLIED OPTICS, 2012, 卷号: 51, 期号: 36, 页码: 8877
Zhang, J; Zhang, QL; Qiu, KS; Jiang, M; Zhang, DX; Feng, BH; Zhang, JY
收藏  |  浏览/下载:36/0  |  提交时间:2013/09/23
NUMERICAL SIMULATION OF ULTRA-BROADBAND PHASE-SENSITIVE OPTICAL PARAMETRIC AMPLIFICATION OF IMAGE 期刊论文  OAI收割
journal of russian laser research, 2011, 卷号: 32, 期号: 6, 页码: 547-555
作者:  
Li, Xuefeng;  Long, Hanbo;  Liu, Hongjun
收藏  |  浏览/下载:31/0  |  提交时间:2012/06/29
Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文  OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者:  
Zhang J.
收藏  |  浏览/下载:30/0  |  提交时间:2013/03/25
Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus  which means the system MTF is quite insensitive to defocus  and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However  it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration  especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification  a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm  effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed  in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried  and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.  
THEORETICAL AND EXPERIMENTAL STUDIES OF FANNING EFFECTS IN PHOTOREFRACTIVE CRYSTALS 期刊论文  OAI收割
JOURNAL OF APPLIED PHYSICS, 1993, 卷号: 74, 期号: 2, 页码: 813
XIE, P; HONG, YH; DAI, JH; ZHU, Y; ZHANG, HJ
收藏  |  浏览/下载:23/0  |  提交时间:2013/09/23