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出典:Wiktionary
出典:『Wiktionary』 (2015/05/24 16:46 UTC 版)
roof prism (複数形 roof prisms)
出典:Wikipedia
出典:『Wikipedia』 (2011/04/26 02:33 UTC 版)
A roof prism (also called a Dach prism as dach is German for roof) is in general any kind of reflective optical prism containing a section where two faces meet at a 90° angle. Reflection from the two faces returns an image that is flipped laterally across the axis where the faces meet.
roof prism