Half mirror

Japanese: half mirror(英語表記)halfmirror
Half mirror

...In English, magic mirror means a magic mirror that reflects the future or distant scenes, and can also refer to a so-called magic mirror that shows a pattern resembling a sculpture on the back of the mirror when light is reflected off a wall or other object. However, in Japan, this word is used as a colloquial name for a mirror that reflects light from the bright side and cannot be seen through, that is, a semi-transparent mirror (also called a half mirror). Mirrors are generally made by applying a reflective metal film (reflective film) to the front or back of glass, but a semi-transparent mirror is made by thinning the reflective film and attaching glass to the back, allowing some of the light to pass through and some to reflect.

*Some of the terminology that mentions "half mirror" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…英語でmagic mirrorといえば未来のことや遠くの情景を映す魔法の鏡という意味であり,また,光を壁などに反射させたとき鏡の裏の彫刻に似た模様が現れる,いわゆる魔鏡を指す場合もある。しかし日本では,明るい側からは反射して透視できず,暗い側からは透視できる鏡,すなわち半透鏡(半透明鏡,ハーフミラーhalf mirrorともいう)の俗称としてこのことばが使われている。鏡は一般にガラスの表面あるいは裏面に反射用の金属膜(反射膜)を塗布して作られるが,半透鏡はこの反射膜を薄くして裏側にもガラスを合わせたもので,光の一部を透過し一部を反射する。…

※「half mirror」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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