25 November 2009 Study on the wavefront coding characteristics by ray tracing method
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Abstract
It is quite important to study the wavefront coding characteristics further for deeper understanding the theory of wavefront coding, and improving the quality of final image restoration and the coding performance of the system. First of all, a model to study the coding relationship between the incident ray and the emerging ray in different parts of aperture was established by ray tracing method based on a finished design of the handy wavefront coding system for measuring the crack width in concrete. Second, the rotation relation between the phase mask and its corresponding PSF was discussed. Finally, the analysis and evaluation of the shape, size and the intensity distribution of PSF along with different fields were completed. The results show that the PSF azimuths of the coded system vary with the different placement of phase mask and the PSF expands seriously in the meridian direction (expanding rate 59.9%) while nearly remains the same in the sagittal direction when the object field increasing. It will help us to divide isoplanatic regions and modify the PSF for the final image restoration.
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Huaiyu Cai, Huaiyu Cai, Tao Lei, Tao Lei, Liqiang Fan, Liqiang Fan, Zhanhua Huang, Zhanhua Huang, } "Study on the wavefront coding characteristics by ray tracing method", Proc. SPIE 7506, 2009 International Conference on Optical Instruments and Technology: Optical Systems and Modern Optoelectronic Instruments, 75060Y (25 November 2009); doi: 10.1117/12.838065; https://doi.org/10.1117/12.838065
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