基于三色三孔数字剪切散斑干涉的高温三维变形测量

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关键词：数字剪切散斑干涉；变形测量；热辐射干扰；复合梯形积分中图分类号：TP394.1;O436.1文献标识码：Adoi：10.37188/OPE.20253315.2468 CSTR：32169.14.OPE.20253315.2468

Tri-color tri-aperture digital shearography for high-temperature three-dimensional deformations measurement

WU Yunfei1，WU Sijin 1* ，LI Xuan1， ZHANG Shuo¹，SONG Jiazheng¹，TANG Xiaojun 2 ，XIN Liang²，SUN Zijie 2 ，NIU Haisha'

1. College of Instrumentation Science and Opto-electronic Engineering， Beijing Information Science and Technology University，Beijing l022O6，China; 2.Beijing Spacecrafts，China Academy ofSpace Technology，Beijing 1Ooo94，China） *Corresponding author，E-mail：swu@bistu.edu.cn

Abstract：Although trichromatic digital shearography is resistant to disturbances and insensitive to rigidbody motion，itsapplication in high-temperature environments is hindered by interference from self-emitted thermal radiation and by its inherent limitation to measuring displacement gradients rather than direct 3D deformation.To overcome these constraints，a tri-color，tri-aperture digital shearography method is proposed for 3D deformation measurement at elevated temperatures.A tri-color tri-aperture diaphragm enables independent narrow-band filtering of each optical channel，eectively suppressing interference from the object's spontaneous thermal emission. The displacement field is reconstructed using a composite trap ezoidal integration scheme，allowing direct recovery of the 3D deformation. Experimental results indicate a minimum measurable displacement of 30nm ，demonstrating effective acquisition of 3D deformations at high temperatures，successful suppression of thermal-radiation interference，and high-precision 3D measurement capability.

Key words：digital shearography；deformation measurement；thermal radiation interference；composite trapezoidal integration

1引言

航空航天领域对更高速度、更稳定飞行器的持续追求，导致服役环境日益严苛，不仅提高了飞行器材料需承受的温度，也使得热致变形问题更加显著，给材料的设计与制造提出了更大的挑战[1-3]。（剩余11727字）