A homemade cost effective raman spectrometer with high performance

• Autores: Montoya Rossi, Eduardo, Arbildo López, Aurelio, Baltuano Elías, Óscar
• Formato: artículo
• Fecha de Publicación: 2015
• Institución: Universidad de Lima
• Repositorio: ULIMA-Institucional
• Lenguaje: español
• OAI Identifier: oai:repositorio.ulima.edu.pe:20.500.12724/3577
• Enlace del recurso: https://hdl.handle.net/20.500.12724/3577
• Nivel de acceso: acceso abierto
• Materia: Spectrum analysis; Scientific apparatus and instruments; Aparatos científicos; Espectroscopía

The characteristics of a low cost, easy to construct, homemade Raman spectrometer are described and its performance presented and discussed. The light sensor of the spectrometer is a consumer grade EOS DSLR camera; the instrument uses a green laser pointer for signal excitation of transparent liquid samples, in transmission mode. The spectral resolution is approximately 15 cm-1.Construction, operation, calibration and image processing aspects are explained in detail. Good quality Raman spectra obtained for few pure liquids (benzene, carbon tetrachloride, and toluene) and mixtures (naphthalene – benzene – carbon tetrachloride and 96% volume rectified ethanol) are presented and discussed. It is proposed that the construction of the described spectrometer could be assigned as a project to student groups, under teacher guidance, providing a valuable opportunity of project based meaningful learning in several topics of Raman spectroscopy and optical instrumentation.