摘要
研究了一种基于约束最优化方法的数字全息再现技术,将物光波的复振幅的重建作为优化问题来解决,在迭代过程中使物平面的光场分布不断接近真实值,得到待测温度场相位变化后,利用滤波反投影算法(FBP)重建折射率差分布,进而得到气体温度场分布。进行了散热片和电烙铁附近温度场的检测实验,结果表明,约束最优化再现算法对复杂物体强度像与相位像的重建效果比传统方法更好,结合滤波反投影算法,重建所得加热元件的温度场结果与电热偶测量结果一致。
A kind of digital holographic representation technology based on constraint optimization method was studied in this paper. The complex amplitude of object waves is solved as an optimization problem, and the light field distribution is constantly close to the real value in iteration. After obtaining the phase change of temperature field, the filter back projection(FBP) algorithm is used to reconstruct refractive index difference distribution. Then, the distribution of gas temperature field is obtained. The test results show that constrained optimization reconstruction algorithm is better than traditional methods in reconstruction of intensity and phase images of complex objects. Combined with the filter back projection algorithm, the reconstructed temperature field of heating element is consistent with measured results of thermocouple.
作者
范非凡
王凤鹏
宋哲武
FAN Feifan;WANG Fengpeng;SONG Zhewu(College of Physics and Electronic Information,Gannan Normal University,Ganzhou Jiangxi 341000,China)
出处
《激光杂志》
CAS
北大核心
2022年第2期42-47,共6页
Laser Journal
基金
国家自然科学基金(No.61965002)
江西省重点研发计划项目(No.20192BBG70006)。
关键词
数字全息
约束最优化
滤波反投影
温度场
digital holography
constrained optimization
filtered back projection
temperature field
