돔 유리를 이용한 위치이동 다중화 홀로그램 정보저장장치용 서보 컨트롤
Linear interrogation of fiber Bragg grating sensor array using time-delayed quadrature sampling technique
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Abstract
We propose a servo control method using a dome-type glass in shift-multiplexed holographic data storage. We first store five 2-D data by shift-multiplexing in a holographic disk with 5% variation in their diffraction efficiencies. During read-out of the stored data, the servo control using the dome glass correctly compensates mechanical errors of the disk; tilt error of ±0.2o and run-out error of ±50 mm. Use of the dome-type glass in servo control makes a pickup module more compact in size and easier to control than the previous method using parallel glass plate [Sungphil Kim, et al., Hankook Kwanghak Hoeji, Vol. 14, No. 1, pp. 58-64, 2003].
참고문헌 (12)
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