研究目的
Investigating the influence of droplets on laser transmission in bad weather, focusing on divergence angle, illuminance, and optical path difference.
研究成果
The study concludes that the radius, quantity, incident angle, and refractive index of raindrops influence laser transmission, with quantity being the major factor. It provides a simple method to evaluate laser loss during transmission in rainy weather and suggests improvements for future models.
研究不足
The study assumes raindrops are homogeneous and isotropic ellipsoids, which may not fully capture the complexity of real raindrop shapes and distributions. The influence of wind speed and other environmental factors on raindrop characteristics is not considered.
1：Experimental Design and Method Selection:
The study is based on geometric optic theory and the distribution of raindrop size and shape. It discusses the relationship between the incidence and emergence angle of droplets and investigates the effects of raindrops on Ladar divergence angle, illuminance, and optical path difference.
2：Sample Selection and Data Sources:
The research uses statistical models for raindrop size distribution, specifically referencing the Marshall and Palmer exponential raindrop size distribution and Ulbrich’s model.
3：List of Experimental Equipment and Materials:
Not explicitly mentioned in the abstract.
4：Experimental Procedures and Operational Workflow:
The paper analyzes the influence of individual raindrops and then extends the analysis to a large quantity of raindrops. It presents the illuminance of scanning targets and laser radar received by the detector.
5：Data Analysis Methods:
The study uses geometric optics to derive analytical expressions for the influence of droplets on laser transmission.
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