title: Single shot high resolution digital holography.
abstract: We demonstrate a novel computational method for high resolution image recovery from a single digital hologram frame. The complex object field is obtained from the recorded hologram by solving a constrained optimization problem. This approach which is unlike the physical hologram replay process is shown to provide high quality image recovery even when the dc and the cross terms in the hologram overlap in the Fourier domain. Experimental results are shown for a Fresnel zone hologram of a resolution chart, intentionally recorded with a small off-axis reference beam angle. Excellent image recovery is observed without the presence of dc or twin image terms and with minimal speckle noise.
authors.affiliation: Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016, India. kedark@physics.iitd.ac.in
authors.forename: Kedar
authors.initials: K
authors.lastname: Khare
authors.forename: P T Samsheer
authors.initials: PT
authors.lastname: Ali
authors.forename: Joby
authors.initials: J
authors.lastname: Joseph
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D007089:Image Enhancement / Q000295:instrumentation*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*