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    National Tsing Hua University Institutional Repository > 理學院 > 物理系 > 期刊論文 >  An absolute measurement of optical reflectivity by modification of a WMS system

    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/54453

    Title: An absolute measurement of optical reflectivity by modification of a WMS system
    Authors: Sen-Yen Shaw;Juh-Tzeng Lue
    教師: 呂助增
    Date: 1981
    Publisher: Institute of Physics
    Relation: JOURNAL OF PHYSICS E-SCIENTIFIC INSTRUMENTS, Institute of Physics, Volume 14, Issue 10, 1981, Pages 1135-1136
    Keywords: optical reflectivity
    Abstract: The absolute optical reflectivity of a solid sample can be measured by some modification of a wavelength modulating spectrometer (WMS) system. The arrangement of a feedback loop applied to the high voltage source of the photomultiplier tube in conjunction with a sample-and-hold circuit provides a reflectivity measurement free of the strong characteristic lines inherent to an arc lamp. Meanwhile, the application of a high speed chopper greatly increases the signal-to-noise ratio in both the absolute and derivative measurements.
    URI: http://www.iop.org/
    Appears in Collections:[物理系] 期刊論文

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