设计了应用于低温、真空测量的激光诱导荧光系统。使用真空室作为样品室,采用斜射式光学结构,系统结构简单、灵敏度高。测量了氧化锌固体和罗丹明B水溶液的荧光光谱。结果表明,系统对于罗丹明B水溶液的最小检测限为1×10~(-12)mol/L,荧光信号峰值与溶液浓度呈较好线性关系。 A laser induced fluorescence system is designed for low temperature and vacuum measurement. The use of vacuum chamber as a sample chamber, the use of oblique optical structure, the system structure is simple, high sensitivity. The fluorescence spectra of zinc oxide solid and rhodamine B aqueous solution were measured. The results showed that the minimum detection limit of the system for rhodamine B aqueous solution was 1 × 10 ~ (-12) mol / L, the fluorescence signal peak and the solution concentration showed a good linear relationship.