2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51106We compute the Casimir energy of a real scalar field in the presence of a pair of partially transparent plane mirrors, modeled by Dirac delta potentials.6 pages, 2 figures, LaTeX. Contribution to the Proceedings of the XXII Brazilian National Meeting on Particles and Fields (Sao Lourenco, October 22-26, 2001)High Energy Physics - TheoryQuantum Physicstext