摘要
使用平行平晶做分光元件建立了剪切量随平行平晶偏转角可调的横向剪切实时干涉系统,该系统在最佳偏转角下所得最大剪切量与平行平晶的厚度成正比。实验表明,当系统的横向剪切量大于被测火焰畸变波面宽度的一半时,剪切域中的非核心剪切区将出现半幅以上的双曝光条纹,以之进行干涉测温处理可以避开传统剪切干涉测量技术所必需的剪切相位还原算法。这意味着实时双曝光条纹可以简单地通过大剪切量横向剪切干涉系统得到。
A new real time lateral shearing interferometry using interferometer plate was proposed. Various lateral shearing distance can be obtained with different deflecting angle of the interferometer plate.Maximal lateral shearing distance at optimal deflecting angle is proportionable to the thickness of interferometer plate.When lateral shearing distance exceeds half-width of the test distorted wave, non-core shearing part in the whole shearing region shows more than half of the double exposure holographic interference fringe pattern so data process of interferometric thermometry can be carried out without shearing reduction algorithms which leads to complex computation.It means that real time double exposure fringe pattern can be obtained simply using the lateral shearing interferometry with large lateral shearing distance.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2010年第4期717-719,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50636010
No.50721005)
教育部博士点新教师基金(No.200804871140)
关键词
火焰
干涉测温
横向剪切
双曝光
剪切量
flame
interferometric thermometry
lateral shearing
double exposure
shearing distance
