Proceedings of the Korean Society of Precision Engineering Conference (한국정밀공학회:학술대회논문집)
- 2005.06a
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- Pages.1099-1102
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- 2005
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- 2005-8446(pISSN)
5 Axis Picomotor Control for Pixel matching in Holographic Data Storage
홀로그래픽 저장장치의 픽셀 매칭을 위한 5 축 피코모터 제어
- 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)
- Published : 2005.06.01
Abstract
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.
Keywords
- Holographic Data Storage;
- Pico motors;
- Pixel matching;
- BER;
- Visual Servo;
- SLM(Spatial Light Modulation)
- 홀로그래픽 저장장치;
- 피코모터;
- 픽셀 정합;
- 비트에러율;
- 비쥬얼 서보;