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Chin. Phys. B, 2012, Vol. 21(10): 104203    DOI: 10.1088/1674-1056/21/10/104203

Dispersion compensation for an ultrathin metal film using LCD–CCD system

Dai Yua b, Zhang Jian-Xua
a Institute of Robotics and Automatic Information System, Nankai University, Tianjin 300071, China;
b State Key Laboratory of Robotics and System, Harbin Institute of Technology, Harbin 150080, China
Abstract  A dispersion compensation method is introduced to correct the distorted image passing through an ultrathin metal film. An LCD-CCD system is modeled by the back propagation network and used to evaluate the transmittance of the ultrathin metal film. Training samples for the network come from 729 images captured by shooting test patches, in which the RGB values are uniformity distributed between 0 and 255. The RGB value of the original image that will be distorted by the dispersion is first transformed by mapping from the LCD to the CCD, multiplied by the inverse matrix of the transmittance matrix, and finally transformed by mapping from the CCD to the LCD, then the corrected image is obtained. In order to verify the effectiveness of the proposed method, ultrathin aluminum films with different thicknesses are evaporated on glass substrates and laid between the CCD and LCD. Experimental results show that the proposed method compensates for the dispersion successfully.
Keywords:  ultrathin metal film      dispersion compensation      back propagation network      LCD-CCD system  
Received:  22 April 2012      Revised:  22 May 2012      Accepted manuscript online: 
PACS:  42.30.-d (Imaging and optical processing)  
  11.55.Fv (Dispersion relations)  
Fund: Project supported by the National High Technology Research and Development Program of China (Grant No. 2009AA044001), the Open Funds of the State Key Laboratory of Robotics and Systems (HIT), China (Grant No. SKLRS-2010-MS-01), and the Fundamental Research Funds for the Central Universities, China.
Corresponding Authors:  Dai Yu     E-mail:

Cite this article: 

Dai Yu, Zhang Jian-Xu Dispersion compensation for an ultrathin metal film using LCD–CCD system 2012 Chin. Phys. B 21 104203

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