指出窄带噪声概念在激光包络探测中已失去意义,应采用宽带噪声描述。根据Rice的随机噪声的数学分析,总结了相应的宽带噪声分析结果,明确了工程设计的依据。发现在I_t/I_n>>1的条件下,宽带噪声结果和窄带噪声结果极其相似。最后,作为分析结果的一种应用,评论了人们已经提出的,提高激光测距仪极限可靠性的一些方法。 It is pointed out that the concept of narrowband noise has no meaning in the laser envelope detection and should be described by wideband noise. According to the mathematical analysis of Rice’s random noise, the corresponding broadband noise analysis results are summarized, and the basis of engineering design is clarified. It is found that the broadband noise results are very similar to the narrowband noise results with I_t / I_n >> 1. Finally, as an application of the results of the analysis, comments have been made on some of the methods that have been proposed to improve the ultimate reliability of laser range finders.