Color translucent head-up display based on a segmented Fourier hologram


Jaroslaw Suszek, Maciej Sypek, Andrzej Siemion, Agnieszka Fajst, Michal Makowski and Andrzej Kolodziejczyk


“The paper presents the numerical and experimental results of reconstructing images from a spatially segmented Fourier hologram with additional carrier frequencies, acting as a translucent head-up display (HUD). Successful reconstructions of colorful images visible at the infinity were achieved. The design procedure is described and some limitations of the method are discussed, like the appearance of ghost images. Exemplary results from numerical and real experiments are given. In order to obtain color images three beams of primary colors were successfully utilized to create a color mixture.”

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Publication: Photonics Letters of Poland

Issue/Year/DOI: Vol 1, No 3 (2009)
DOI: 10.4302/plp.2009.3.02

Simplified approach to diffraction tomography in optical microscopy

Author(s): Reto Fiolka, Kai Wicker, Rainer Heintzmann, and Andreas Stemmer


“We present a novel microscopy technique to measure the scattered wavefront emitted from an optically transparent microscopic object. The complex amplitude is decoded via phase stepping in a common-path interferometer, enabling high mechanical stability. We demonstrate theoretically and practically that the incoherent summation of multiple illumination directions into a single image increases the resolving power and facilitates image reconstruction in diffraction tomography. We propose a slice-by-slice object-scatter extraction algorithm entirely based in real space in combination with ordinary z-stepping. Thereby the computational complexity affiliated with tomographic methods is significantly reduced. Using the first order Born approximation for weakly scattering objects it is possible to obtain estimates of the scattering density from the exitwaves.”

Link to Publications Page

Publication: Optics Express, (free download)

Issue/Year/DOI: Optics Express, Vol. 17, Issue 15, pp. 12407-12417 (2009)