Spectrometer signal quality improvement via background...

Details Spectrometer signal quality improvement via background... Spectrometer signal quality improvement via background...

2007-03-02

2008-12-30

Evans, F. L (Department: 2877)

Optics: measuring and testing

By dispersed light spectroscopy

With background radiation comparison

C356S301000, C356S326000

Reexamination Certificate

active

07471390

ABSTRACT:
A spectrometer collects background spectra during the idle time in which it is not collecting spectra from a sample. These spectra are collected over a range of exposure times, allowing the background reading on each pixel to be modeled as a function of exposure time. When sample spectra are then collected, the exposure time for the sample spectra can be used with the modeled function to compute an estimated background within the sample spectra. The estimated background can then be subtracted from the sample spectra, thereby reducing the noise therein.

REFERENCES:
patent: 5272518 (1993-12-01), Vincent
patent: 6974973 (2005-12-01), Rossi et al.
patent: 2004/0170215 (2004-09-01), Rossi et al.
patent: 2007/0216900 (2007-09-01), Dalrymple

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