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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (2 ): 3-    DOI: 10.1631/jzus.2007.A0180
    
Simple PSF based method for pupil phase mask’s optimization in wavefront coding system
ZHANG Wen-zi, CHEN Yan-ping, ZHAO Ting-yu, YE Zi, YU Fei-hong
State Key Laboratory of Modern Optical Instrumentation, Optical Engineering Department, Zhejiang University, Hangzhou 310027, China
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Abstract  By applying the wavefront coding technique to an optical system, the depth of focus can be greatly increased. Several complicated methods, such as Fisher Information based method, have already been taken to optimize for the best pupil phase mask in ideal condition. Here one simple point spread function (PSF) based method with only the standard deviation method used to evaluate the PSF stability over the depth of focus is taken to optimize for the best coefficients of pupil phase mask in practical optical systems. Results of imaging simulations for optical systems with and without pupil phase mask are presented, and the sharpness of image is calculated for comparison. The optimized results showed better and much more stable imaging quality over the original system without changing the position of the image plane.

Key words： Wavefront coding      Pupil phase mask      Depth of focus      PSF stability      Optimization      Sharpness      Imaging simulation     
Received: 20 April 2006     
CLC:  O435.2  
  O438.2  
  TN202  
  TN76  
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ZHANG Wen-zi
CHEN Yan-ping
ZHAO Ting-yu
YE Zi
YU Fei-hong
Cite this article:

ZHANG Wen-zi, CHEN Yan-ping, ZHAO Ting-yu, YE Zi, YU Fei-hong. Simple PSF based method for pupil phase mask’s optimization in wavefront coding system. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(2 ): 3-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0180     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I2 /3

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