同时介绍了金息母光栅所用材料，镀膜机的清洗和分离器具的结构。

The material used for holographic grating, the cleaning of vaccum coating machine and the structure of the separator are also presented.

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采用高精度的衍射光栅刻划机刻划依然是制作高质量母光栅最重要的手段，因此，跟踪世界光栅刻划机的最新技术进展具有重要的现实意义。

Ruling with grating ruling engine is still the most important means for the fabrication of master grating. Hence, it is valuable to track the state-of-the-art of the diffraction grating ruling engine.

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