Overview Of IR Instrumentation In Ambient Air Monitoring

Claus B. Ludwig

doi:10.1117/12.955158

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15 November 1976 Overview Of IR Instrumentation In Ambient Air Monitoring

Claus B. Ludwig

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Proceedings Volume 0095, Modern Utilization of Infrared Technology II; (1976) https://doi.org/10.1117/12.955158
Event: 20th Annual Technical Symposium, 1976, San Diego, United States

Abstract

A brief overview of point and remote monitors that operate in the infrared region is given . At present, optical correlations techniques are widely used in point samples. Thus, a brief description of the historical development is given, which started with the nondispersive infrared (NDIR) technique and has recently emerged as the gas filter correlation (GFC) technique. The basic theoretical formulation for GFC is given. Infrared remote monitors are applied more frequently in recent times. They include both active and passive systems. These systems come in many configurati ons, providing line integral, line average and line profile data. The theoretical sensitivity of practical systems is discussed, including eye safety considerations for laser systems.

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Claus B. Ludwig "Overview Of IR Instrumentation In Ambient Air Monitoring", Proc. SPIE 0095, Modern Utilization of Infrared Technology II, (15 November 1976); https://doi.org/10.1117/12.955158