光学显现提取技术是无损检测潜在指印的重要技术手段，而照明激发光源的可用光功率及光斑光强分布的均匀性对指印的光学显现效果及检测率具有重要的影响。采用紫外传输液芯光纤作为指印光学显现系统照明激发光源的导光传输元件，实验测量了液芯光纤在紫外光波段的传输特性，得到了266 nm激光光束在液芯光纤中的传输效率及其随光纤弯曲半径的变化关系，实现了光纤传输出射光束的均匀光强分布，可满足指印显现提取所需的高功率、均匀照明激发条件。研究结果为液芯光纤应用于指印光学显现系统照明激发光源的导光传输提供了实验依据，具有实际应用价值。

The optical imaging and detecting system is important for noninvasive detection of latent fingerprints, in which the power utilization and intensity distribution uniformity of illuminating and exciting light source have great influences on the revealing effect and the detection ratio. Using the ultraviolet (UV) transmitting liquid core fiber as the optical guiding and transmitting element for the illuminating and exciting light source, the transmission characteristics of liquid core fiber in UV range are experimentally investigated. The transmission efficiency of 266 nm laser in the liquid core fiber and the relationship between the transmission efficiency and the fiber curve radius are obtained, and the intensity distribution of output beam transmitted in the liquid core fiber is measured with the uniform intensity distribution. Using the liquid core fiber as the optical guiding and transmitting element for the light source in the fingerprints optical detecting system can improve the light utilization and realize the uniform illumination condition equired, and the results have application values.