Back Prisma de Porro Catalan Porroprisma German Prisma de Porro Spanish Redresseur terrestre French Prisma di Porro Italian Porroprisma Dutch Призмы Малафеева — Порро Russian Porrova prizma Slovenian போரோ பட்டகம் Tamil 普羅稜鏡 Chinese
In optics, a Porro prism, named for its inventor Ignazio Porro, is a type of reflection prism used in optical instruments to alter the orientation of an image.
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