翻訳と辞書
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・ First Strike (Stargate Atlantis)
・ First Strike Coins
・ First Strike Ration
・ First Strike Still Deadly
・ First String
・ FIRST Stronghold
・ First Student
・ First Student (United States)
・ First Student Canada
・ First Student UK
・ First Succession Act
・ First Sudanese Civil War
・ First Suite in E-flat for Military Band
・ First Sumatran expedition
・ First Sunday
First surface mirror
・ First Swedish Crusade
・ First Synod of Asunción
・ First Synod of Tyre
・ First Taiwan Strait Crisis
・ First Take
・ First Take (album)
・ First Take (TV series)
・ First Talk with Tamara Bull
・ First Tape
・ First Taranaki War
・ First Target
・ First Tarlev Cabinet
・ First Tarnovo Uprising
・ First Taste of Sin


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First surface mirror : ウィキペディア英語版
First surface mirror

A first surface mirror or front surface mirror (also commonly abbreviated FS mirror or FSM) is a mirror with the reflective surface being above a backing, as opposed to the conventional, second surface mirror with the reflective surface behind a transparent substrate such as glass or acrylic. In cases where the mirror is subjected to extreme cold (as low as 33 K as in the James Webb Space Telescope), a polished pure beryllium mirror is used without a first surface coating in order to obviate buckling caused by differing coefficients of thermal expansion.
They are made for applications requiring a strict reflection without a ''ghosting'' effect as seen with a second surface mirror, where a faint secondary reflection could be observed, coming from the front surface of the glass. This includes most optics applications where light is being manipulated in a specific manner. Telescopes, rear-projection televisions, periscopes, non-reversing mirrors, high quality kaleidoscopes, and the animation process Spectrafocus use this type of mirror.
== Silvering ==
(詳細はsilvering" on a front surface mirror is usually aluminium for visible light and gold for infrared radiation.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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