IR/TS

Transmission Spectroscopy

Transmission Spectroscopy is the oldest sampling technique in optical spectroscopy and therefore counts with the largest libraries, used as standards for comparison of spectra obtained by other techniques. The high expertise developed in this field makes it convenient for solid, liquid and gas samples.

In this technique, the sample is placed on the path of a beam affecting its intensity. By comparison of the incident beam intensity with the one transmitted through the sample we obtain the spectra, characteristic of each substance.

I = I0 · 10-abc

Although it is assumed that in this way absorption (a) is measured, reflection and other phenomena also take place. This is a very consistent technique in which the only adjustable parameter is the optical path length (b) or thickness of the sample that can range from microns for solids and liquids to even kilometers for gas samples. This is usually done by rotating one of the mirrors.

transmission spectroscopy samples cells and schemes

Information about composition and concentration are obtained from the spectra with our software tailored to many applications as plastic quality control, food inspection, pollutants on chimney gases, contaminants in water or any other fluid etcetera

Depending on the sample and operating conditions microptik can provide many different sampling cells, flow through cells, angle inspection cells, high temperature cells and a wide variety of probes for big granular solids, powder, fluid samples and much more.

Transmission spectroscopy gas cell          transmission spectroscopy high temperature cell

                       High pressure gas cell                                                                     High temperature cell