Interferogram

Japanese: interferogram
Interferogram

…Since δ is expressed as 2π⊿/λ using the optical path difference ⊿ between the light beams and the wavelength λ, the frequency of the above sine wave decreases as the wavelength of the light becomes longer. When light consisting of various wavelength components is input, a unique pattern is obtained that includes the sine wave interference patterns corresponding to each wavelength component, and the fluctuating portion is called an interferogram. Therefore, if this is subjected to Fourier analysis, it becomes a spectrum. …

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…δは光束間の光路差⊿と波長λを用いて2π⊿/λで示されるから,上記正弦波の周波数は光の波長が長いほど低くなる。種々の波長成分からなる光を入れると,それぞれの波長成分に相当する正弦波干渉パターンが加わった独特のパターンが得られるが,その変動部分をインターフェログラムinterferogramと呼ぶ。したがってこれをフーリエ解析すればスペクトルになることがわかる。…

※「interferogram」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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