Abstract
Non-diffracting beam (NDB) is useful in lidar transmitter because of its high propagation efficiency and high resolution. We aimed to generate NDB in random media such as haze and cloud. The laboratory experiment was conducted with diluted processed milk (fat: 1.8%, 1.1μmφ). Narrow view angle detector of 5.5mrad was used to detect the forward scattering waveform. We obtained the central peak of NDB at the propagation distance of 5cm ~ 30cm in random media by adjusting the concentration of <10%.
Highlights
Aerosols and dusts have interactions between the ground and the cloud
This paper presents the propagation characteristics of non-diffracting beam (NDB) in different receiving distance to analyze the components of the scattering waveform and generation of NDB at short distances (5cm) in random media with higher concentration
The experiment of different receiving distance demonstrated that NDB in center part is composed of forward scattering and surrounding part is composed of multiple scattering
Summary
Aerosols and dusts have interactions between the ground and the cloud. They actively float in the low-altitude atmosphere. The lidar transmitted beam catches strong scattering, it cannot penetrate at long distance in random media such as cloud and haze. Having a long distance penetration in random media is important for studying the remote sensing techniques such as deeper sensing in cloud structure and target recognition through haze [4,5]. Variation of NDB in different receiving distance was not clear. The objective of this research is to obtain variation of NDB in different receiving distances to analyze the components of the scattering waveform, and generate NDB at short distances (5cm) in random media with higher concentration
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