ANALYTICAL STUDIES PERTAINING TO THE MEASUREMENT OF LIGHT ABSORPTION IN AIR

reportActive / Technical Report | Accession Number: AD0679590 | Open PDF

Abstract:

Experimental methods proposed for the measurement of the absorption coefficient of light in air are analyzed. The calculations are primarily intended for the wavelength region where, for certain wavelengths, the absorption coefficient to be measured is estimated to be of the order of . 000000001 per cm. The effects of scattering, heat conduction, static and acoustic pressure variations are examined and are related to the problem of detecting the signals produced by the absorption of heat from the laser beam. Both pulsed and cw schemes are considered. The measurement of the static pressure rise in a narrow tube appears as a feasible, although marginal method which offers some hope of success. Also, an interferometric method appears feasible. Finally, the absorption coefficient of the 10.6 micron carbon dioxide laser beam was measured in air.

Author(s):
Lengyel, Bela A. ; Romagnoli, Robert J.
Author Organization(s):
SAN FERNANDO VALLEY STATE COLL NORTHRIDGE CA
Descriptive Note:
Final rept. 1 Feb 1966-31 Aug 1968
Pagination:
0072

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release, Document Partially Illegible
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited. Document Partially Illegible.

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-66-C-0098, ARPA ORDER-306
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.7_Experimentation; JCA_1.2.3_Educating
Modernization Areas:
Quantum Science and Computing; Directed Energy
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*LASERS, *LIGHT, *LIGHT TRANSMISSION, ABSORPTION, ACOUSTICS, CONDUCTION(HEAT TRANSFER), GAS LASERS, INTERFEROMETERS, PROPAGATION, THERMAL CONDUCTIVITY, THERMAL RADIATION
Field(s)/Group(s):
Lasers and Masers, Optics, Thermodynamics
Report Date:
1968 Oct 30