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首页> 外文期刊>review of scientific instruments >Highhyphen;resolution light spot localization with photodiode arrays
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Highhyphen;resolution light spot localization with photodiode arrays

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We describe two analog electronic techniques to determine the position of a light spot on a linear photodiode array by detecting its intensity peak or its centroid. The position was detected with an accuracy of 1 and 3.5 mgr;m by the two methods, respectively, using a 16hyphen;mgr;m centerhyphen;tohyphen;center array. As an example, the displacement of a mirror was measured with a sensitivity of 0.05 mgr;m.

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