Concave lens: These types of lenses are thinner in the middle and thicker on the edges. Any beam of light parallel to the principal axis is converged by this lens to a point known as the focus. Concave lens: These types of lenses are thicker at the center and thinner at the ends. Any...
Chinese English Pinyin Dictionary Search with English, Pinyin, or Chinese characters. Powered byCC-CEDICT 凹镜Trad.凹鏡 āojìng concave mirror