LEDは、電気エネルギーを光エネルギーに変換する半導体素子です。レーザダイオード (LD)と比較すると、安価で長寿命というメリットをもっています。 浜松ホトニクスでは、主に受光素子と組み合わせて使用される、赤色から中赤外の各種LEDを用意しています。
レーザ励起プラズマ光源（LDLS：Laser-Driven Light Source）は浜松ホトニクスの子会社であるEnergetiq Technology, Inc.(米国)が開発した新しい光源です。キセノンガスを充填したバルブ内の放電電極間に、集光したレーザ光でプラズマを発生させて発光を維持する方式を採用した世界で唯一の光源です。
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