1.
magnifying glass; magnifier; loupe
A lens or device that makes objects appear larger than they are. Includes handheld magnifying glasses, loupes, and digital magnification tools.
拡大鏡で見る。
To look through a magnifying glass.
小さな文字を読むのに拡大鏡を使っている。
I use a magnifying glass to read small print.
スマートフォンにも拡大鏡機能がついていて、カメラで文字を大きく映せる。
Smartphones also have a magnifier function, allowing you to enlarge text using the camera.
Compound: 拡大 (enlargement) + 鏡 (mirror/lens). Also called ルーペ (loupe — from German) or 虫眼鏡 (magnifying glass — literally 'insect-viewing lens', more colloquial). In computing, 拡大鏡 refers to the screen magnifier accessibility feature. Related: 虫眼鏡 (magnifying glass — everyday word), ルーペ (loupe), 顕微鏡 (microscope), 望遠鏡 (telescope).