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利用自制的Ｈｅ－Ｎｅ激光器，进行了激光器光束方向性及频率同时稳定的研究，使频率稳定度达到４×１０￣（－１０），角漂小于２×１０￣（－５）ｒａｄ．
The self-made He-Ne laser was used to study the directivity and frequency stability of the laser beam. The stability of the laser was 4 × 10 -10 and the angular drift was less than 2 × 10 -5 rad.