Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Infrared detection of liquids on terrestrial surfaces by CO2 laser heating

Not Accessible

Your library or personal account may give you access

Abstract

The strong mid-infrared bands of contaminant liquids wetting sand and soil can be remotely detected by 0.103-eV laser irradiation with beam intensity well below that which chars the terrain. Emissions from heated nonvolatile interstitial liquid liquid layers and extinction of thermoluminescence by beam-generated vapors of volatile contaminants are spectrally distinct within the infrared contaminant fingerprint spectral region—as measured by a Michelson interferometer based FT-IR radiometer instrument. The contaminant’s vibrational resonance intensities change proportionally in magnitude and sign in measured contiguous difference FFT spectra, within a specific beam-to-sample dwell period. The onset irradiation time and period for detecting these bands can differ according to amount and volatility of contaminant, beam intensity and its time of dwell necessary to produce sufficient thermoluminescence flux, and on the quantity of interferogram data acquisitions.

© 1990 Optical Society of America

Full Article  |  PDF Article
More Like This
Surface contamination detection by means of near-infrared stimulation of thermal luminescence

Arthur H. Carrieri and Erik S. Roese
Appl. Opt. 45(4) 736-743 (2006)

Thermal luminescence sensor for ground-path contamination detection

Arthur H. Carrieri, Irving F. Barditch, David J. Owens, Erik S. Roese, Pascal I. Lim, and Michael V. Talbard
Appl. Opt. 38(27) 5880-5886 (1999)

Neural network pattern recognition of thermal-signature spectra for chemical defense

Arthur H. Carrieri and Pascal I. Lim
Appl. Opt. 34(15) 2623-2635 (1995)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved