摘要
光源的选择对研究水中气泡界面的光强非常重要。研究水中气泡流体可视化PIV技术时,如果CCD探测器已经获得某散射光的强度,反推照明光源的强度,这为流体可视化技术提供选择光源强度和光源位置的理论依据。首先导出散射光线与入射点的夹角公式,明确任一散射光的位置;再由CCD探测器获得某次散射光的强度,利用菲尼尔公式并考虑光的吸收导出入射点光源的光强公式;最后通过实验获得实验结果与理论值相吻合。
The incidence light source is very important for the PIV（particle image velocimetry） of bubble in water. In studying the visible PIV technique, if a certain intensity of scatter light beam out of the bubble in water is obtained by CCD （charge coupled device） camera, and the scatter angle can be obtained too, the intensity of incidence light source can be deducted by pulling back. This work can provide a theoretic base for PIV to select light source intensity and position. The angle relation expression of scatter light and incidence light is educed first in this paper; the posi- tion of scatter light can be definituded;some certain scatter light intensity can be obtained by CCD camera, then,the incidence light intensity formulas of light source have been confirmed by Fresnel formula considering of the water absorbing. The experiment result is tallied with the calculated values by the self-made instrument.
出处
《西安理工大学学报》
CAS
2007年第1期43-46,共4页
Journal of Xi'an University of Technology
基金
陕西省自然科学基金资助项目(2006A08)
西安理工大学博士启动基金(108-210614)
关键词
水中气泡
界面
散射光
入射光
bubble in water
interface
scatter light
incidence light
