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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。
The transverse shear real-time interferometer system, whose shear volume is adjustable with parallel flat crystal deflection angle, is established by using parallel flat lens as the light splitting element. The maximum shearing amount of the system under the optimal deflection angle is proportional to the thickness of parallel flat crystals. Experiments show that when the transverse shear of the system is greater than half of the width of the wave distortion of the flame under test, the non-core shear zone in the shear field will appear more than half of the double exposure stripe, so that the interference temperature measurement can be avoided Shear Phase Reduction Algorithm Required for Traditional Shear Interferometry Technology. This means that real-time double exposure stripes can be easily obtained by a large shear transverse shear interference system.