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Multichannel ultra-sensitive optical spectroscopic detection
(2019)
Abstract
Increased sensitivity of spectrometers through reducing noise in independent voltage signals via a differential voltage analyzer utilizing a reference wavelength from a wavelength region in which the optical absorption of the sample is negligible. In an embodiment, a grating permits selection of a reference wavelength. In another embodiment, filters permit selection of a reference wavelength. In yet another embodiment, both a grating and a filter permit selection of a reference wavelength. In an aspect, the differential voltage analyzer reduces noise by minimizing a differential voltage between the independent voltage signals and the reference voltage signal by adjusting the value of a cancellation coefficient.
Disciplines
Publication Date
October 22, 2019
Comments
Patent Number
US10451479B2
Citation Information
Zhi Xu. "Multichannel ultra-sensitive optical spectroscopic detection" (2019) Available at: http://works.bepress.com/zhi-xu/19/