Sampling and Reconstruction of the Pupil and Electric Field for Phase Retrieval

This technology is based on sampling considerations for a band-limited function, which has application to optical estimation generally, and to phase retrieval specifically. The analysis begins with the observation that the Fourier transform of an optical aperture function (pupil) can be implemented with minimal aliasing for Q values down to Q = 1. The sampling ratio, Q, is defined as the ratio of the sampling frequency to the band-limited cut-off frequency. The analytical results are given using a 1-d aperture function, and with the electric field defined by the band-limited sinc(x) function. Perfect reconstruction of the Fourier transform (electric field) is derived using the Whittaker-Shannon sampling theorem for 1

Keywords:

• Electric field
• Phase retrieval
• Pupil
• Sampling (statistics)
• Optics
• Fourier transform
• Computer vision
• Aperture
• Mathematics
• Artificial intelligence
• Sinc function
• Nyquist–Shannon sampling theorem
• Pupil function
• Sampling (signal processing)
• Aliasing

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