Implementation of real-time displacement precision measurement technology for the sinusoidal phase-shifting laser self-mixing interferometer

Liu, Qiang; Wang, Ming; Tao, Yufeng; Chen, Junbao; Huang, Hui; Guo, Dongmei

doi:10.1117/12.2083897

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…In addition, in order to improve the accuracy of self-mixing interferometry, researchers have begun to pay attention to the importance of phase demodulation and proposed time-domain coherent demodulation [36], orthogonal demodulation [37], Fourier analysis [38], and other algorithms to demodulate the displacement and vibration information.…”

Section: Laser Self-mixing Interferometrymentioning

confidence: 99%

Research Progress of Stress Measurement Technologies for Optical Elements

Wei

Pang

Bai

et al. 2021

International Journal of Optics

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It is of great significance to measure the residual stress distribution accurately for optical elements and evaluate its influence on the performance of optical instruments in optical imaging, aviation remote sensing, semiconductor manufacturing, and other fields. The stress of optical elements can be closely related to birefringence based on photoelasticity. Thus, the method of quantifying birefringence to obtain the stress becomes the main method of stress measurement technologies for optical elements. This paper first introduces the basic principle of stress measurement based on photoelasticity. Then, the research progress of stress measurement technologies based on this principle is reviewed, which can be classified into two methods: polarization method and interference method. Meanwhile, the advantages and disadvantages of various stress measurement technologies are analyzed and compared. Finally, the developing trend of stress measurement technologies for optical elements is summarized and prospected.

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Section: Laser Self-mixing Interferometrymentioning

confidence: 99%