Real-valued diffraction calculations for computational holography [Invited]

Abstract

Computational holography, encompassing computer-generated holograms and digital holography, utilizes diffraction calculations based on complex-valued operations and complex Fourier transforms. However, for some holographic applications, only real-valued holograms or real-valued diffracted results are required. This study proposes a real-valued diffraction calculation that does not require any complex-valued operation. Instead of complex-valued Fourier transforms, we employ a pure real-valued transform. Among the several real-valued transformations that have been proposed, we employ the Hartley transformation. However, our proposed method is not limited to this transformation, as other real-valued transformations can be utilized.

Incoherent Digital Holography for Multidimensional Motion Picture Imaging

“…As another study remarked, the limitation of the measurement accuracy in interferometry and holography can be quantitatively evaluated based on the theory of quantum optics [38]. Algorithms and architectures for high-speed image reconstruction are also highly required for use in real-time measurement [39][40][41]. We will show experimental results for multidimensional holographic imaging of incoherent light, such as sunlight and LED light, in the presentation.…”

Roadmap of incoherent digital holography

“…The combination of FINCHSCOPE and the high-speed IDH system will make it possible to realize the holographic 3D imaging of incoherent light with high spatial and temporal resolutions. Furthermore, acceleration of holographic image reconstruction is researched for IDH systems [179,180]. Accelerations of both recording and reconstruction in IDH lead to the improvement of throughput in holographic measurement, and such research achievements will cause real-time holographic motion-picture imaging.…”