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A loupe ( ) is a simple, small magnification device used to see small details more closely. Unlike a magnifying glass, a loupe does not have an attached handle, and its focusing lens(es) are contained in an opaque cylinder or cone or fold into an enclosing housing that protects the lenses when not in use. Loupes are also called hand lenses. == Optics == Three basic types of loupes exist: * Simple lenses, which result in the highest degree of optical aberration and are generally lower magnification. * Multiple lenses, generally higher magnification because of the reduced optical aberration. * Prismatic, Multiple lenses with prisms used to change the perspective. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Loupe」の詳細全文を読む スポンサード リンク
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