ルーペ

noun

magnifying glass; loupe

A small handheld magnifying glass, often used for examining details in stamps, coins, jewelry, or watchmaking. The word 'loupe' is common in technical contexts.

from German Lupe

• 切きっ手ての細こまかい模も様ようをルーペで観かん察さつした。

  I examined the fine details of the stamp with a magnifying glass.

• 時計とけい職しょく人にんはルーペを目めに当あてて作さ業ぎょうする。

  The watchmaker works with a loupe held to the eye.