DESARROLLO DE UN SISTEMA FOTOACÚSTICO PARA LA DETERMINACIÓN DE COEFICIENTES DE ABSORCIÓN ÓPTICOS.

The article presents the development of a photoacoustic system to determine optical absorption coefficients in medical therapies and diagnostics. The system uses a closed cell where the absorption of modulated optical radiation occurs, generating a periodic heating of the sample. Laser diodes of different wavelengths are used, and an optical system has been developed to direct the beam of light towards the sample. A PID control was implemented to regulate the temperature of the lasers, and an interface was developed in LabView 2016 to control the system and store the data. Preliminary measurements were made using plastic cylinders, and improvements in the hardware and software of the system are planned. [Extracted from the article]