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Priority to ES1968136951UpriorityCriticalpatent/ES136951Y/es
Publication of ES136951UpublicationCriticalpatent/ES136951U/es
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Publication of ES136951YpublicationCriticalpatent/ES136951Y/es
Lámina de aumento óptico, que se caracteriza por estar constituida en materia moldeable transparente, de dimensiones variables, una de cuyas caras presenta una impresión o grabado formando surcos concéntricos muy próximos entre si, estableciendo una sucesión de superficies ópticas, determinando en la lámina una lente plano-cóncava, de eje óptico común con una distancia focal única.
ES1968136951U1968-03-121968-03-12Lamina de aumento optico.
ExpiredES136951Y
(es)