한국정밀공학회:학술대회논문집 (Proceedings of the Korean Society of Precision Engineering Conference)
- 한국정밀공학회 2005년도 춘계학술대회 논문집
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- Pages.1099-1102
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- 2005
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- 2005-8446(pISSN)
홀로그래픽 저장장치의 픽셀 매칭을 위한 5 축 피코모터 제어
5 Axis Picomotor Control for Pixel matching in Holographic Data Storage
- Lee Jae-Seung (Mechanical Eng. Dept., Yonsei Graduate School) ;
- Choi Jin-Young (Yonsei Univ. CISD) ;
- Yang Hyun-Seok (Yonsei Univ. CISD) ;
- Park Young-Pil (Yonsei Univ. CISD)
- 발행 : 2005.06.01
초록
In this paper, a new visual servo method, which uses 5 axis picomotor to compensate the misalignment generated between a SLM and a CCD in a holographic storage device, was proposed and the effectiveness of it was proved by the experiment. In a holographic storage device, the data processing is done by the SLM and the CCD, and the shape of data is 2 dimensional binary patterns. Therefore, the exact image matching between the SLM and the CCD is very important, and the mismatching of it causes the errors in the data reconstruction. First, the brief introduction of a holographic data storage is given, then, BER concept which is errors caused by pixel mismatch between the SLM and the CCD is defined. Second, the geometric relation between 5 axis picomotor and the CCD movement is studied. Finally, the visual servo method using 5 axis picomotor to reduce the BER in a holographic storage device is proposed and experimented. From the experiment, we find that about 3% BER improvement is obtained by the proposed method.