The temperature measurements of the rotational Raman lidar of the University of Hohenheim (UHOH RRL) during the High Definition of Clouds and Precipitation for advancing Climate Prediction (HD(CP)) Observation Prototype Experiment (HOPE) in April and May 2013 are discussed. The lidar consists of a frequency-tripled Nd:YAG laser at 355 nm with 10 W average power at 50 Hz, a twomirror scanner, a ...

Accurate interferometric measurement of large laser slabs requires spatial frequencies of 1mm/cycle to 33mm/cycle over a 100mm field of view to be passed by the system with no more than 25%loss in modulation. To eliminate noise and artifacts due to strictly coherent imaging, many commercial interferometers employ a rotating diffuser on an intermediate image plane and relay this image incoherent...

In this paper, we propose a three-dimensional (3-D) measurement method of objects in liquid with a laser range finder. When applying vision sensors to measuring objects in liquid, we meet the problem of an image distortion. It is caused by the refraction of the light on the boundary between the air and the liquid, and the distorted image brings errors in a triangulation for the range measuremen...

Jinwen Liang Tsinghua University State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Beijing 100084 China Abstract. We demonstrate theoretically the feasibility of the full-attitude measurement of a moving target by laser tracking systems. Based on the combination of retroreflector target, laser tracking, and interferometry techniques, tw...