Centro de Investigaciones en Optica

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Centro de Investigaciones en Optica (also known as CIO) is a research center in the field of optics, which is a branch of physics. CIO is located in the city of Leon in the state of Guanajuato in Mexico (approximately at 21°09'12.02"N 101°42'15.84"W). It also has an industrial research facility in the city of Aguascalientes.