1. 聚光器用于聚光并將光引向某物體或通過一凸透鏡組的鏡子、透鏡或透鏡組
   A mirror, lens, or combination of lenses used to gather light and direct it upon an object or through a projection lens.
2. 色差由于光學(xué)器件（如透鏡）的物理缺陷而造成的不完美成象
   An imperfect image caused by a physical defect in an optical element, as in a lens.
3. 他用一面凸透鏡把陽光在紙上聚成焦點。
   He focused the sun's ray on a piece of paper with a burning-glass.
4. 這個透鏡能放大20倍。
   This lens can magnify 20 diameter.

透的英語翻譯：

鏡的英語翻譯：