concave lens

常见例句

Just as a double convex lens enlarges so a double concave lens reduces.
正象雙凸透鏡可以放大那樣，雙凹透鏡也可以縮小。
The invention provides a method with a concave lens focus as a welding heat source and a welding device thereof.
本發明提供一種以凸透鏡焦點爲銲接熱源的方法及其銲接裝置。
ip.com
Among the reshaping systems converting a Gaussian beam to a flattop beam, the system composed of a plane-concave and a plane-convex lens, is a relatively simple structure.
在將高斯光束整形爲平頂光束的整形系統中，由兩個非球麪鏡組成的系統是比較簡單的結搆形式，該系統由平凹鏡和平凸鏡組成。