由一机部组织的氦氖激光器测试对比及技术交流会议,于1978年12月2日至15日在广州召开。会议分两阶段,第一阶段从12月2日至10日在广州机床研究所进行,主要是搞测试对比。参加的单位有29个,人数49人。测试的激光管有:200、250、400、1000毫米等四种规格。测试的参数有:模式,输出功率、发散角、输出功率稳定性、管压降、击穿电压、光斑漂移、对半外腔和外腔 Helium-neon laser test organized by a machine department contrast and technology exchange meeting, in December 2, 1978 to December 15 held in Guangzhou. The meeting is divided into two phases, the first phase from December 2 to December 10 at the Guangzhou Machine Tool Research Institute, mainly engage in test comparison. There are 29 participating units, the number of 49 people. Test the laser tube are: 200,250,400,1000 mm, and other four specifications. Test parameters are: mode, output power, divergence, output power stability, tube voltage drop, breakdown voltage, spot drift, the outer and outer half of the cavity