Continuous internal response calibration for FT-IR spectrometry

Roger J. Combs; Christopher J. Manning

doi:10.1117/12.455731

22 February 2002 Continuous internal response calibration for FT-IR spectrometry

Proceedings Volume 4577, Vibrational Spectroscopy-based Sensor Systems; (2002) https://doi.org/10.1117/12.455731
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

Abstract

Calibration of Fourier transform infrared (FT-IR) spectrometer response is crucial to quantitative spectroradiometric measurements. The use of light emitting diodes (LEDs) as probes of detector channel response is further demonstrated. Detector channel response functions significantly impact spectrometer performance. LED modulation bandwidths, some extending well into the megaHertz (MHz) range, are more than fast enough for characterization of FT-IR detector channel responses. A variety of optical probe signals can be generated using LEDs driven by waveform generators, lock-in amplifiers or digital signal processors. Accurate determination of the phase and gain responses of both the IR signal and laser reference channels is straightforward. With appropriate modulation of the IR LEDs, channel response is measurable on a scan-by-scan basis, perhaps even to the point of accurately determining detector saturation in real time.

Citation Download Citation

Roger J. Combs and Christopher J. Manning "Continuous internal response calibration for FT-IR spectrometry", Proc. SPIE 4577, Vibrational Spectroscopy-based Sensor Systems, (22 February 2002); https://doi.org/10.1117/12.455731

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available