经二○九所学术委员会讨论,评选出1978～1979年度科技成果如下: 砷酸二氢铯单晶的生长; 掺镁铌酸锂晶体的研制和生长; 雪崩光电二极管在激光测距机中的应用; 测定半导体导电类型的三探针全类型装置; 光电探测器灵敏度的标定和测量; 雪崩光电器件倍增、噪声、体漏电流测定; 光电探测器响应时间的测量; After the discussion by 209 academic committees, the scientific and technological achievements from 1978 to 1979 were selected as follows: the growth of cesium arsenate single crystal; the development and growth of magnesium-doped lithium niobate crystal; the avalanche photodiode in the laser range finder Applications; All three types of devices for determining the conductivity type of semiconductors; Calibration and measurement of sensitivity of photodetectors; Multiplication of avalanche optoelectronic devices; Measurement of noise and body leakage current; Measurement of photodetector response time;