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Proceedings Paper

IDT-SEM observation of fringe pattern in volume hologram and its application to multicolor recorded HOEs
Author(s): Motoshi Ono; Misato Uchida; Akio Masui; Norihito Nakazawa; Hiromi Sakurai; Masahiro Hirano
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Paper Abstract

Photopolymer films developed by DuPont have excellent features as volume hologram recording material including high resolution, high diffraction efficiency, full color recording capability and fabrication with all dry processing. We have prepared several types of HOEs by using the films to implement designed function such as high power, multi-color recording and controlling of the diffraction bandwidth. To accomplish them, direct and precise knowledge of the fringe pattern such as slant angle and fringe space was strongly required. We have developed a new technique for the observation of the fringe pattern by scanning electron microscope (SEM) with an aid of Iodine dying pre-treatment (IDT-SEM). It is thought that Iodine is preferentially adsorbed at double bondings in unpolymerized monomers, which leads to a presumption that Iodine distribution detected by SEM accurately reproduce the refractive index modulation in volume hologram. This has been confirmed experimentally by the observation that fast Fourier transform analyses of SEM images for single, two and three color recorded HOEs are good agreement with optical spectra of the HOEs. The SEM image provides us the spatial information of both fringe space and slant angle with good resolution. This technique has been further applicable to other type of HOEs.

Paper Details

Date Published: 10 April 1997
PDF: 12 pages
Proc. SPIE 3011, Practical Holography XI and Holographic Materials III, (10 April 1997); doi: 10.1117/12.271353
Show Author Affiliations
Motoshi Ono, Asahi Glass Co., Ltd. (Japan)
Misato Uchida, Asahi Glass Co., Ltd. (Japan)
Akio Masui, Asahi Glass Co., Ltd. (Japan)
Norihito Nakazawa, Asahi Glass Co., Ltd. (Japan)
Hiromi Sakurai, Asahi Glass Co., Ltd. (Japan)
Masahiro Hirano, Asahi Glass Co., Ltd. (Japan)

Published in SPIE Proceedings Vol. 3011:
Practical Holography XI and Holographic Materials III
Stephen A. Benton; T. John Trout, Editor(s)

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