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文中评述了铍材用作光学镜体的优越性及其发展状况，讨论了影响铍镜尺寸稳定性的因素及提高尺寸稳定性的可能途径。
In this paper, the superiority of beryllium material as an optical mirror body and its development are reviewed. The factors that affect the dimensional stability of beryllium mirror and the possible ways to improve the dimensional stability are discussed.