CAJ | 학술논문

采用同轴全息技术诊断粒子场时,粒子尺寸过小会影响再现粒子统计的精度,而粒子场分布密度过大会影响全息图像的记录质量.针对可见光同轴全息中出现的微小粒子分辨和光透过率弱等问题,提出采用红外激光进行粒子场诊断的方法.数值模拟了红外激光与绿光激光记录小粒子的情况,分析结果显示:红外激光将小粒子的再现像放大,信息光增强,有利于小粒子的记录;实验验证了红外激光透过高密度物场的能力明显高于绿光激光.从而表明采用红外激光同轴全息技术进行小尺寸、高密度粒子场的实验诊断具有一定的优势.
채용동축전식기술진단입자장시,입자척촌과소회영향재현입자통계적정도,이입자장분포밀도과대회영향전식도상적기록질량.침대가견광동축전식중출현적미소입자분변화광투과솔약등문제,제출채용홍외격광진행입자장진단적방법.수치모의료홍외격광여록광격광기록소입자적정황,분석결과현시:홍외격광장소입자적재현상방대,신식광증강,유리우소입자적기록;실험험증료홍외격광투과고밀도물장적능력명현고우록광격광.종이표명채용홍외격광동축전식기술진행소척촌、고밀도입자장적실험진단구유일정적우세.
The difference of in-line particle hologram are shown mainly for different laser wavelength. The hologram of the particle field is influenced by the microparticle diameter and particle density. These two parameters may even determine the quality of the measurement. Therefore,these two parameters are mainly discussed for different laser wavelength through numerical simulation. The interference fringes of microparticle are enlarged by infrared laser and easy to resolve. Simultaneously,the transmissivity of infrared laser through the high density object field is larger than green laser and verified by experiment. All results confirm the dominance of infrared laser in-line particle holography.