Mr. Fubao Wu Profile

Fubao Wu

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Proceedings Article | 28 February 2021 Paper

Development of key parameters metrology and calibration equipment for medical laser therapy apparatus

Liangcheng Duan, Wenli Liu, Zhixiong Hu, Baozhong Xu, Fubao Wu, Jiayi Yang, Kai Zhong, Jianquan Yao

Proceedings Volume 11781, 117810R (2021) https://doi.org/10.1117/12.2591724

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We developed and verified a metrology and calibration equipment based on LabVIEW and USB-bus technology for measuring key parameters of medical laser therapy apparatus. In this paper, aiming at Q-switched Nd:YAG pulsed laser therapy apparatus whose safety and reliability issues are prominent, according to measurement requirements of key parameters during treatment, we designed a portable, high-precision, user-friendly and all-in-one measuring equipment. The designed equipment can carry out the measurement of pulsed laser key parameters including wavelength, pulse width, repetition frequency, pulsed energy or power, spot size of treatment area and beam divergence angle. For aiming beam, which is continuous wave laser, wavelength and power can be measured. In addition, the quantity values of the measuring equipment we designed were traceable to national standards of measurement effectively, which includes three items: measuring range of pulse width is 1 ns~100 ns and maximum permissible error (MPE) does not exceed ±10 %; measuring range of pulsed energy is 1 mJ~2 J, class of accuracy is up to 5, surface uniformity better than ±3 % and zero drift better than ±2 %; measuring range of treatment-area spot size is 2 mm~8 mm and MPE does not exceed ±10 %.

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