| 摘要 |
<p>In accordance with the desired diopter value, the required curvature, and with torus-like grinding, the so-called cross-curvature is computed, and according to the desired field of view, a second curvature is computed, whereafter the glass is arranged in a generator and a center hollowing (3) is milled according to the basic curvature, while thereafter the glass edge (2) around the center hollowing (3) is milled according to said second curvature, and the center hollowing (3) of the thus-machined glass is finished, respectively polished, by using a tool with convex radiusing which corresponds to the basic curvature, whereafter the edge (2) is subjected to at least one finishing operation and one polishing operation by using an implement with a convex radiusing which corresponds to said second curvature, whereby moreover use is made of a resilient intermediate part between said implement and a finishing pad, respectively polished pad. </p> |
