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Proceedings Paper

The pattern recognition of 16 levels gray image with iterative exposure schedule in Zn:Fe:LiNbO3
Author(s): Qingxin Meng; Yubin Gai; Yi Zhang; Suhua Luo; Xiudong Sun; Yongyuan Jiang
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Paper Abstract

An iterative method designed by angle multiplexing holographic storage is introduced to determine exposure schedule for multiplexing storage in Zn(2mol.%):Fe(0.03wt.%):LiNbO3 crystal. In this experiment, 60 holograms were recorded in the same location of the crystal with 2mJ/cm2 incident exposure energy per hologram (0.7s exposure time at 2.8mW/cm2 total incident intensity). And the self-correlation peaks of holograms were collected by CCD. We found that the cumulative grating strength of correlation peak versus exposure energy could be fitted to be a sixth-order polynomial, and made use of an iterative expression to calculate the exposure schedule for 60 holograms. The correlation recognition of 99 pictures with 16 levels gray is completed and the accuracy is 100%, while an appropriate exposure schedule is used to store the two-dimensional holograms.

Paper Details

Date Published: 15 September 2005
PDF: 4 pages
Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 59660Z (15 September 2005); doi: 10.1117/12.649645
Show Author Affiliations
Qingxin Meng, Harbin Institute of Technology (China)
Yubin Gai, Harbin Institute of Technology (China)
Yi Zhang, Harbin Institute of Technology (China)
Suhua Luo, Harbin Institute of Technology (China)
Xiudong Sun, Harbin Institute of Technology (China)
Yongyuan Jiang, Harbin Institute of Technology (China)

Published in SPIE Proceedings Vol. 5966:
Seventh International Symposium on Optical Storage (ISOS 2005)
Fuxi Gan; Lisong Hou, Editor(s)

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