(plural Porro prisms)
Named after its inventor, Ignazio Porro.
"porro-prism." YourDictionary, n.d. Web. 11 October 2018. <http://www.yourdictionary.com/porro-prism>.
porro-prism. (n.d.). Retrieved October 11th, 2018, from http://www.yourdictionary.com/porro-prism
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