Half-zone-plate processing for objects on both sides of hologram display

Kenji Yamamoto; Ryutaro Oi; Tomoyuki Mishina; Makoto Okui

doi:10.1117/12.762903

25 January 2008 Half-zone-plate processing for objects on both sides of hologram display

Kenji Yamamoto, Ryutaro Oi, Tomoyuki Mishina, Makoto Okui

Proceedings Volume 6912, Practical Holography XXII: Materials and Applications; 69120Q (2008) https://doi.org/10.1117/12.762903
Event: Integrated Optoelectronic Devices 2008, 2008, San Jose, California, United States

Abstract

Single-sideband holography with half-zone-plate processing is a well-known method of displaying computer generated holograms (CGHs) using electronic devices such as liquid crystal displays (LCDs) that do not have narrow pixel intervals. Half-zone plate only permits primary images to pass through a single-sideband spatial filter and cuts off conjugate and carrier images; however, there is a problematic restriction on this method in that objects being shot must be either in front of or behind the hologram. This paper describes a new approach to simultaneously placing them on both sides of the hologram, which means we can eliminate this restriction. The underlying idea is when half-zone plate permits the primary images in front of the hologram to pass through a single-sideband spatial filter, the conjugate images cannot pass through it. When we prepare a half-zone plate on the opposite side, the primary images on both sides of the hologram can pass through but the conjugate images cannot. This approach not only doubles the area of objects but also reduces computational time because objects can be placed close to the hologram. We implemented this approach, tested it, and confirmed its effectiveness.

Citation Download Citation

Kenji Yamamoto, Ryutaro Oi, Tomoyuki Mishina, and Makoto Okui "Half-zone-plate processing for objects on both sides of hologram display", Proc. SPIE 6912, Practical Holography XXII: Materials and Applications, 69120Q (25 January 2008); https://doi.org/10.1117/12.762903

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