当我们拿到从玻璃厂制造出的光学玻璃时,就发现在玻璃方块的左上角有很多标记。为什么要有这些标记?这些标记表示些什么呢? 大家知道,对光学玻璃的要求是非常严格的,光学玻璃的性能和质量指标就有四十多项,通常规定的要求也有十几项。而且,在光学玻璃生产中,由于客观条件的变化,每次生产的同一牌号玻璃在性能上也会有差别;在退火过程中,同一批牌号玻璃往往要 When we got the optical glass made from the glass factory, we found a lot of marks in the upper left corner of the glass box. Why do these marks? What do these marks mean? As we all know, the requirements for optical glass are very strict. There are more than 40 indexes and quality indexes of optical glass, and there are more than ten requirements. Moreover, in the optical glass production, due to changes in the objective conditions, the same brand of glass produced in each performance will be different; in the annealing process, the same batch of brand glass often