摘要
云滴粒子探测器是人工影响天气的重要测量仪器之一,为建立可用于业务的云滴粒子探测器,对云滴粒子探测器的光学系统进行设计。该探测器使用单模光纤耦合输出的685 nm的激光作为光源,通过方形光阑和4 f光学系统产生均匀照明,接收系统中利用45°反射镜中心开孔抑制直接入射光,并用小孔光阑控制整个光学系统的景深。实验结果表明,激光整形后光束近似均匀,系统能对直接入射光具有较强的抑制能力、景深控制方案合理。利用小孔光阑模拟云滴粒子实验表明,该样机具有云滴粒子探测能力。
Probe of cloud droplet （CDP） is one of the most important instruments in the weather modification activities, in order to construct a probe of cloud droplet which can be used in routine observation, the optical system of CDP was designed. In this system, 685 nm diode laser with singlemode fiber coupling output was used as a transmitter, a square pinhole combined with a 4f optical system were used to obtain homogeneous illumination, the illuminating laser was restrained by the hole on the 45 o mirror, and the depth of field of this system was controlled by a 200 μm pinhole placed on the focal plane of the collecting system. Experiments show that the laser beam is closed to fiat-top, the illuminating laser can be controlled efficiently, the scheme of controlling the depth of field is reasonable. Simulating experiments using pinholes indicate that the prototype has the ability to detect cloud droplets.
出处
《红外与激光工程》
EI
CSCD
北大核心
2011年第10期1923-1927,共5页
Infrared and Laser Engineering
基金
国家自然科学基金(40805016)
关键词
MIE散射
云滴粒子
景深
定标
Mie scattering
cloud droplet
depth of field
calibration
