Fig. 3: Fundamental methods of holographic imaging.
From: Quantitative phase imaging based on holography: trends and new perspectives
Digital holographic recording and reconstruction are the processes of matrix conversion between the real-domain and the complex-domain. The spatial field distribution is complex-valued and the detections from the camera are real-valued. According to the configurations, the reconstruction methods can be classified as interferometric and non-interferometric methods. a Illustration of the imaging process. b Data transformation between the complex-amplitude wavefront and the intensity detection. c Phase shifting: In real-domain, using multiple intensities with different phase shifting to reconstruct amplitude and phase. BS: Beam splitter. d Phase retrieval: In real-domain, using multiple intensity images with different modulation to reconstruct amplitude and phase. e Off-axis holography: In the Fourier domain, using spatial carried frequency to modulate the band-limited wave in intensity image to reconstruct amplitude and phase. FT Fourier transform, IFT Inverse Fourier transform. f Sideband modulation: In the Fourier domain, using analytical sideband complex-amplitude wave to reconstruct amplitude and phase. FP Fourier plane
