Jisho

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Noun
1. periscope
Wikipedia definition
2. Periscopea Mirrors b Prisms c Observer's eye]] The two periscopes differ in the way how they erect the image. The left one uses an erecting prism whereas the right uses an erecting lens and a second image plane. a Objective lens b Field lens c Image erecting lens d Ocular lens e Lens of the observer's eye f Right-angled prism g Image erecting prism]] A periscope (or berinscope) is an instrument for observation from a concealed position.
Read “Periscope” on English Wikipedia
Read “潜望鏡” on Japanese Wikipedia
Read “Periscope” on DBpedia

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