Measurement of slot misalignment in an optical archive data storage system using dual sensing

Sung Yong Lim, Hyunseok Yang, Seunghon Yoo, Han Baek Lee, Young Do Choi

Research output: Contribution to journalArticlepeer-review


Optical disc cartridges for archive data storage are made up of multi-slot arrays, where each slot holds a disc. An archive data storage system should tolerate some level of misalignment between the disc and the cartridge slot. However, misalignment can lead to disc crashes against the slot walls or into other discs, and is often caused by poor positioning of the disc-transfer robot. Therefore, detecting misalignment is important to ensure the reliability of optical archive data storage systems. Here, we analyze the misalignment and propose a dual-sensing method based on a 4F imaging system. The method can simultaneously detect the top and bottom parts of the slots using only one detector.

Original languageEnglish
Pages (from-to)1549-1555
Number of pages7
JournalMicrosystem Technologies
Issue number8-9
Publication statusPublished - 2014 Aug

Bibliographical note

Funding Information:
We would like to gratefully acknowledge the support of Hitachi-LG Data Storage Inc. and the Center for Information Storage Devices, which have designated this research as a specialization project by Yonsei University. In addition, this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2013R1A1A2012658).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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