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Real Time Light Intensity Control Algorithm Using Digital Image Mask for the Holographic Data Storage System  

Kim, Sang-Hoon (연세대학교 기계공학과)
Yang, Hyun-Seok (연세대학교 기계공학과)
Park, Young-Pil (연세대학교 기계공학과)
Publication Information
Transactions of the Society of Information Storage Systems / v.6, no.1, 2010 , pp. 1-5 More about this Journal
Abstract
Holographic data storage system(HDSS) has many noise sources - crosstalk, scattering and inter pixel interference, etc. Generally the intensity of a light generated from the laser source has Gaussian distribution and this ununiformity of light also can make the data page to have a low SNR. A beam apodizer is used to make the laser as a flat-top beam but the intensity distribution is not strictly uniform. The intensity of light can be controlled using image mask. In this paper the intensity distribution of light used for HDSS is controlled by a digital image mask. The digital image mask is changed arbitrarily in real-time with suggested algorithm for the HDSS.
Keywords
Holographic data storage; digital image mask; noise reduction;
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