Zhang Rong-fu, Wang Liang-liang, Wang Tao, Lu Kang, Li Bin-yan, Zhuang Song-lin
College of Optics and Electronics Information Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2011 Jul;31(7):1999-2002.
The wavefront coding extension the depth of field (DOE) of an imaging system is by insert a phase plate into the pupil plane of a spatially incoherent imaging system, the encoded image can be digitally restored to produce a final image with improved depth dependent detail. To study the multicolor imaging performance of a logarithmic wavefront coding system, the phase and chromatic aberration variation with wavelength are analyzed, and characteristics such as shape, distribution and width of two wavelengths' PSF are compared. The research results show that if the chromatic aberration is excellently corrected then the technology can be used for multicolor even broadband spectrum DOE imaging system. Otherwise, the encode image can not be effectively decoded.
波前编码通过在空间非相干成像系统的光瞳平面插入一个相位板来扩展成像系统的景深（DOE），编码图像可以进行数字恢复以产生具有改进的深度相关细节的最终图像。为了研究对数波前编码系统的多色成像性能，分析了相位和色差随波长的变化，并比较了两个波长的点扩散函数（PSF）的形状、分布和宽度等特性。研究结果表明，如果色差得到很好的校正，那么该技术可用于多色甚至宽带光谱景深成像系统。否则，编码图像无法有效解码。
