HOLOGRAM RECORDING DEVICE AND HOLOGRAM RECORDING METHOD
PROBLEM TO BE SOLVED: To provide a hologram recording device in which the power of recording light to be delivered to the medium is improved by suppressing the change in light transmission at the time of exposure/light-shielding of the liquid crystal shutter.SOLUTION: A hologram recording device 10...
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Main Author | |
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Format | Patent |
Language | English Japanese |
Published |
05.09.2016
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide a hologram recording device in which the power of recording light to be delivered to the medium is improved by suppressing the change in light transmission at the time of exposure/light-shielding of the liquid crystal shutter.SOLUTION: A hologram recording device 10 records multiplexed data of a plurality of pages. A liquid crystal shutter 303b transmits (exposed state) or blocks (light-shielded state) the light from a light source 301 by changing the transmission with the voltage applied by a shutter control unit 87. If the exposure time T1 of the liquid crystal shutter 303b is changed in accordance with the page to record, the duty ratio (=T1/(T1+T2), T2 represents the light-shielding time) of the exposure time in each page is maintained substantially constant. Preferably, the duty ratio of the exposure time in each page is set to approximately 0.5.SELECTED DRAWING: Figure 4
【課題】ホログラム記録装置において、液晶シャッタの露光時/遮光時の光透過率の変化を抑えることで、媒体に照射する記録光パワーの精度を向上させること。【解決手段】複数のページのデータを多重して記録するホログラム記録装置10において、液晶シャッタ303bはシャッタ制御部87により印加される電圧により透過率が変化することで、光源301からの光ビームを通過(露光状態)または遮断(遮光状態)する。記録するページに応じて液晶シャッタ303bの露光時間T1を変化させる場合、各ページにおける露光時間のデューティ比(=T1/(T1+T2)、T2は遮光時間)を略一定に保つようにする。好ましくは、各ページにおける露光時間のデューティ比を略0.5とする。【選択図】図4 |
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Bibliography: | Application Number: JP20150037300 |