noun
cylindrical lens
A lens with a cylindrical surface, used to focus light into a line rather than a point. Common in optics and laser applications.
円柱レンズはレーザー光を線状に集光するために使われる。
A cylindrical lens is used to focus laser light into a line.
Compound of 円柱 (cylinder) and レンズ (lens), directly describing the shape.