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concave lens 凹透鏡。

concave mirror

We demonstrate experimentally the technique to fabricate large does in the thick film on a concave lens ( mirrors ) surface with precise alignment by using the strategy of exposure twice 采用兩次曝光的方法在凹透鏡表面上厚光刻膠中制作衍射光學元件。

We fabricated a large computer - generated holography on a concave lens surface to test the convex secondary mirrors surface 在凹透鏡表面上制作出了用于凸非球面檢測的曲面全息圖。

Some are flared ? that is , thicker at the rim than in the center , like a concave lens 有些呈喇叭形即邊緣較中心厚,類似凹透鏡。

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。