Inventors

Zhi XuFollow

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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.

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Patent Number

US10451479B2

Assignee

University of Missouri System

Application Number

US15761488

Date Filed

11-9-2016

Issue Date

10-22-2019

Multichannel ultra-sensitive optical spectroscopic detection

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