During the design process of Blu-ray disc optical pick-up, the optical system and the collimator lens design is especially important.
在蓝光光盘光学头设计过程中，光学系统的设计，有举足轻重的作用，特别是准直镜的设计。
2
The detector parts and the collimator parts are important components of hard X-ray telescope, which mechanics properties decides hard X-ray telescope directly.