Shearography, or digital speckle pattern shearing interferometry, is highly sensitive
to material strain measurements. Among various shearography systems,
the temporal-phase-shift Michelson shearography system is extensively
researched for its high-accuracy diagnosis of the out-of-plane
displacement derivative. However, the system faces difficulties
achieving quantitative measurement due to the need to calibrate
parameters and control random noise. Therefore, finding solutions to
improve system design and performance is essential. This paper focuses
on obtaining more accurate and reliable results for out-of-plane
displacement derivatives. Several methods to calibrate the
magnification, the equivalent pixel size, and the shear amount are
discussed. A temporal-phase-shift shearography system with an online
universal calibration module is designed and tested for performance.
The random noise and stability are under 1µε RMS, and the repeatability is better
than 2.75%. Additionally, the system’s accuracy is verified by digital
speckle pattern interferometry with a 2.5% relative error.