AN IMPROVED SYSTEM FOR REMOTE CHEMICAL ANALYSIS

摘要

A system for remote chemical analysis includes a quartz halogen bulb as a source of infrared light, quartz fibers leading to and from a sample cell, a non-collinear thallium arsenic selenide, AOTF to perform spectral analysis and a lead selenide detector. Both the AOTF and the detector are interfaced with a microcomputer. Under the control of the microcomputer, the system interprets transmission spectra obtained through the passage of infrared light through the sample cell. Microcomputer interface provides rapid random-access to the RF frequency driving the AOTF, which selects the wavelength of light to be examined and provides routines for sample averaging and the comparison of various reference spectra.