Stewart D R, Davis W L
Appl Opt. 1970 Apr 1;9(4):938-41. doi: 10.1364/AO.9.000938.
A statistically designed study was performed to evaluate the homogeneity of selected properties of a large CER-VIT C-101 glass-ceramic mirror blank. A blank 1.9 m in diameter and 0.3 m thick weighing approximately 2180 kg was sampled to determine if the chemical composition, the density, the birefringence, and the linear coefficient of thermal expansion were dependent on the position within the blank. The blank had good homogeneity. The properties varied little throughout the blank, except for birefringence, which varied systematically with position.
进行了一项统计设计研究，以评估大型CER-VIT C-101微晶玻璃镜坯选定性能的均匀性。对一个直径1.9米、厚0.3米、重约2180千克的镜坯进行采样，以确定其化学成分、密度、双折射和线性热膨胀系数是否取决于镜坯内的位置。该镜坯具有良好的均匀性。除双折射随位置有系统变化外，其他性能在整个镜坯中变化很小。
