Real-time coherence holography.
Coherence holography capable of real-time recording and reconstruction is proposed and experimentally demonstrated with a generic Leith-type coherence hologram. The coherence hologram is optically generated in real-time using a Mach-Zehnder interferometer and reconstructed using a Sagnac radial shearing interferometer. With this method one can create an optical field distribution with a desired spatial coherence function, and visualize the coherence function in real-time as the contrast and phase variations in an interference fringe pattern. The reconstructed image of the complex coherence function has been quantified with the Fourier transform method of fringe-pattern analysis.
Naik
Dinesh N
DN
Laboratory for Information Photonics and Wave Signal processing, Department of Information and Communication Engineering, The University of Electro-Communications, Chofu, Tokyo, Japan. naik@ice.uec.ac.jp
Ezawa
Takahiro
T
Miyamoto
Yoko
Y
Takeda
Mitsuo
M
D005583:Fourier Analysis; D006696:Holography / Q000295:instrumentation* / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation / Q000379:methods; D007368:Interferometry; D008962:Models, Theoretical