The single-sideband method of holography, as is well known, cuts off beams that come from conjugate images for holograms produced in the Fraunhofer region and from objects with no phase components. The single-sideband method with half-zone-plate processing is also effective in the Fresnel region for beams from an object that has phase components. However, this method restricts the viewing zone to a narrow range. We propose a method to improve this restriction by time-alternating switching of hologram patterns and a spatial filter set on the focal plane of a reconstruction lens.
© 1999 Optical Society of America
(050.1960) Diffraction and gratings : Diffraction theory
(090.1760) Holography : Computer holography
(100.2650) Image processing : Fringe analysis
(230.3720) Optical devices : Liquid-crystal devices
Tomoyuki Mishina, Fumio Okano, and Ichiro Yuyama, "Time-Alternating Method Based on Single-Sideband Holography with Half-Zone-Plate Processing for the Enlargement of Viewing Zones," Appl. Opt. 38, 3703-3713 (1999)