System for remote chemical analysis

Details System for remote chemical analysis System for remote chemical analysis

1985-09-17

1987-05-12

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

G01N 2902

Patent

active

046639616

ABSTRACT:
The improved system for remote chemical analysis of this invention 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, this equipment gathers and 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 also provides routines for sample averaging and the comparison of various reference spectra. An acousto-optic device mounted in an enclosure which includes input and output crystal fiber connectors is also provided.

REFERENCES:
patent: 4490845 (1984-12-01), Steinbruegge et al.
G. Schmidtke et al., VDI-Berichte 509,293 (1984).

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