For SLA 3d printer, based on the additive manufacturing, is a technique that allows the realization of three-dimensional objects from digital models. SLA rapid prototyping technology uses epoxy resins that allow the production of highly detailed models even with perfectly transparent resins. The SLA technology is particularly suited to the production of models by the high surface detail, useful for coupling test, dimensional controls and ergonomic tests. Stereolithography is based on the photopolymerization of a liquid resin, contained in a tank, sensitive to the ultraviolet radiation emitted by a laser source with a system of mirrors. Interaction of laser radiation [...]