Spectroscopic analysis apparatus employing measurement and reference radiation. [absorption spectroscopy for gaseous pollution]

Patent · Tue Mar 15 00:00:00 EST 1977

OSTI ID:7213013

Chabannes, F M.M.; Milot, E S; Godfrin, P R.L.; Mailly, P P.L.

The apparatus comprises a coherent radiation source which emits, in succession, respective ones of a plurality of different wavelengths. The emitted radiation is separated into a reference portion and a measurement portion. The measurement portion propagates through a medium such as the atmosphere to be analyzed and is received by a measurement detector. The reference portion is received directly by a reference detector. A processing circuit processes signals representing the portions, produced by the detectors to produce numerical data relating to the spectral analysis of the medium. 23 claims, 10 figs.

• Assignee: Etat Francais
• Patent Number(s): US 4012145
• OSTI ID: 7213013
• Resource Relation: Patent Priority Date: Priority date 20 Sep 1973, France
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ABSORPTION SPECTROSCOPY
EQUIPMENT
AIR POLLUTION MONITORS
DESIGN
CHEMICAL ANALYSIS
COHERENT RADIATION
OPERATION
READOUT SYSTEMS
VISIBLE RADIATION
ELECTROMAGNETIC RADIATION
RADIATIONS
SPECTROSCOPY
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)