大气环境监测车载激光雷达系统通过鉴定

2005年7月14日，中科院综合计划局会同基础科学局对中国科学院安徽光学精密仪器研究所承担的奥运科技项目——“大气污染预报、预测和预警技术和设备研究——车载激光雷达”进行了验收。同时，该所研究的“AML-2车载式大气环境监测激光雷达系统”也一同通过了中科院组织的成果鉴定。     

Speckle intensity images of target based on Monte Carlo method

Speckle intensity in the detector plane is deduced in the free-space optical system and imaging system based on Van Cittert-Zemike theorem. The speckle intensity images of plane target and conical target are obtained by using the Monte Carlo method and measured experimentally. The results show that when the range extent of target is smaller, the speckle size along the same direction become longer, and the speckle size increase with increasing incident light wavelengths. The speckle size increases and the speckle intensity images of target is closer to the actual object when the aperture scale augments. These findings are useful to access the target information by speckle in laser radar systems.     

Measurements of cirrus clouds with a three-wavelength lidar

A three-wavelength lidar system is set up. The backscatter signals of 355, 532, and 1 064 nm are mea- sured simultaneously to derive the optical depth, lidar ratio, and backscatter color ratio of cirrus clouds, respectively. The lidar configuration and the data processing are described. The case study shows that the optical depths of cirrus clouds are not dependent on wavelength while the backscatter color ratios are.     

物理学史中的四月 1935年4月：Robert Watson-Watt 取得英国空防雷达系统的专利

 有许多的科学家和工程师都对在第二次世界大战期间，关系盟军的胜利扮演着极重要角色的雷达系统之发展有所贡献。雷达（Radar是RAdio Detection And Ranging的首字母缩略字）透过发送无线电波，再测量其反射回来的讯号以侦测远方的物体，如飞机或船只。Robert Watson-Watt爵士最先发展出实用的雷达系统，在第二次世界大战期间用来帮助防御英国，就是最伟大的雷达先驱之一。     

High-peak-power,single-mode,nanosecond pulsed,all-fiber laser for high resolution 3D imaging LIDAR system

This study presents an eye-safe, single-mode, nanosecond-pulsed, and all-fiber laser source with master- oscillator-power-amplifier configuration at 1 550 nm that is suitable for high-resolution three-dimensional (3D) imaging light detection and ranging (LIDAR) system. The output peak power of 7.6 kW is obtained at the 1.2-ns pulse width and 50-kHz repetition rate. The single-mode pulse laser output ensures the range precision and imaging results of the LIDAR system. The laser is used as a transmitter for the 3D imaging LIDAR system. The detailed characteristics of the LIDAR system and the results of the 3D imaging are presented.     

我国首台二氧化碳拉曼激光雷达系统研制成功

不久前，中科院安徽光学精密机械研究所承担的中科院重点装备“二氧化碳拉曼激光雷达”研制成功，并顺利通过了中科院相关专家组验收。     

相干成象激光雷达

一、微波雷达到激光雷达微波雷达是到目前为止使用最普遍、技术最成熟的雷达技术之一,往往也称其为电雷达或常规雷达.微波雷达是人们相当熟悉的,它已经广泛应用于军事、国民经济以及航空、航天等各个科学技术领域里.但是,微波雷达往往不能给出令人满意的速度、距离以及空间分辨率,特别是在距目标很近时(如几米至几十米之间)微波雷达往往进入盲区,完成不了某些要求,即所谓的“失灵”.即便是在常规时,由于微波的波长较长,对同一目标的信息量获得的少,影响雷达系统的灵敏度.进入二十世纪六十年代,激光器的研制获得成功.于是以激光器为辐射源的激光雷达的研究,引起许多科学家的重视.     

“测不准原理”的多课程融合教学实践

本文使用相同的数学方法对多个课程中测不准原理进行推导证明,并着重分析和比较了多个测不准原理研究对象、物理意义的区别与联系．