Diseño y desarrollo de un espectrómetro óptico para LIBS

Abstract

A prototype of a miniature (13 cm X 10 cm) fiber optic spectrometer with USB communication is presented. This instrument, integrated to laser induced breakdown spectroscopy systems, will make feasible the technology and software independence from commercial spectrometers manufacturers and its imposed measurement sketches. It is composed by a Czerny Turner optical bench, a plane diffraction grating, an optical detector SONY ILX511containing a lineal arrangement of 2048 pixels, a programmable controller PIC18F4550 and a RAM memory. Microcontroller firmware was written in “C” language, using CCS 4.018 compiler. Information corresponding to the optic spectrum acquired by the instrument is sent to a personal computer via USB using virtual instruments programmed in LabVIEW 8. The calibration of the instrument was carried out with mercury and sodium spectral lamps. Copper, magnesium and lead LIBS spectrum was captured.