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全息干涉法应用于实验应力分析的光弹性试验时,当用非线偏振光或用园偏振光时,能得到一幅复杂的应力条纹图,它是表征主应力和的等和条纹族和表征主应力差条纹族的组合。不少文章指出,通过适当的光学处理,可获得互不干涉的等差线及等和线。本文提出一个改进的光路结构和实验结果,可以同时记录已分离了的两族条纹,不但简化了静应力测量,而且非常适宜于动态的应力分析测量。
When applying holographic interferometry to the photoelastic test of experimental stress analysis, a complex stress fringe pattern can be obtained when using either nonlinearly polarized light or circularly polarized light, which is a family of equi-and stripe patterns and characterization of principal stress The main stress difference stripe group combination. Many articles pointed out that by appropriate optical processing, non-interference of each other can be obtained and so on line. In this paper, we propose an improved optical structure and experimental results, which can record the separated two groups of stripes simultaneously, which not only simplifies the measurement of static stress but also is very suitable for dynamic stress analysis and measurement.