集しゅう束そくレンズ

noun

condenser lens; converging lens

Technical term in optics for a lens that focuses light or other radiation.

• 顕けん微び鏡きょうの集しゅう束そくレンズで光ひかりを試し料りょうに集あつめる。

  The microscope's condenser lens focuses light onto the specimen.