Development of Key Parameter Metrology and Detection Equipment for Q-switched Nd:YAG Laser Therapy Apparatus
WU Fu-bao1,2,HU Zhi-xiong2,DUAN Liang-cheng2,ZHONG Kai1,XU Bao-zhong1, LIU Wen-li2,YAO Jian-quan1
1.College of Precision Instrument and Optoelectronics Engineering,Tianjin University, Tianjin 300072, China
2.Center for Medical Metrology, National Institute of Metrology, Beijing 100029, China
Abstract In view of the difficulty in traceability of the key parameters of pulsed laser therapy apparatus, a metrology and detection equipment for the key parameters of Q-switched Nd:YAG laser therapy apparatus based on LabVIEW and USB bus technology was designed and developed. The equipment can measure and detect the key parameters of the treatment laser and the aiming laser and generate the detection report automatically. The main function modules of the system are:pulse width, energy, repetition frequency, spot size and beam dispersion angle, wavelength and aiming laser power measurement. In the spot measurement module, the feedback mechanism into the traditional "knife-edge method" was introduced and the automatic measurement was realized, which can adapt to the laser of different pulse frequencies. Furthermore, the traceability method was further studied, and the uncertainty of spot size measurement reached 3.2%. The uncertainty of other parameters of the laser therapy apparatus measurement and detection equipment was also analyzed, including laser wavelength, pulse width, energy, repetition frequency, and aiming laser power, the uncertainties are 0.6 nm, 4.0%, 3.2%, 0.12% and 3.4%, respectively.
Swanson E A, Fujimoto J G. The ecosystem that powered the translation of OCT from fundamental research to clinical and commercial impact［Invited］［J］. Biomedical Optics Express, 2017, 8(3). 1638-1664.
Xu H. Correct selection of measurement and testing equipment to improve the level of enterprise measurement and testing［J］. Industrial measurement, 2001(S1):4.
Liu Y L. Design of LabVIEW temperaturemonitoring system based on USB［J］. Computer Knowledge and Technology, 2020, 16(13): 7-10.
Qiu H X, Li B H, Ma H,et al. Research on medical application and industrial development strategy of laser technology in China［J］. Engineering Sciences, 2020, 22(3): 14-20.
Ding X,Fu Y Z, Li F, et al. The Method for Measuring the Positioning Accuracy of Confocal Raman Microscope［J］. Acta Metrologica Sinica, 2021, 42(10): 1271-1274.
［3］
Sun Y, You S, Tu H, et al. Intraoperative visualization of the tumor microenvironment and quantificationof extracellular vesicles by label-free nonlinear imaging［J］. Science Advances, 2018, 4(12): 1-10.
Huang X W, Zhou J Q. Current Situation and Prospect of Virtual Instrument Technology［J］. Electrical Measurement & Instrumentation, 2004, 41(10): 5-8.
［17］
Xin M F, Yi Z, Qi B S, et al. Experimental study on measuring the beam waist of Gaussian laser beam using a 90/10 Knife-edge Method［J］. Laser and Infrared, 2018, 38(6), 541-543.
Fu X Y, Hu Z X, Ge C F, et al. Optical coherence tomography based on optical coherence tomography［J］. Acta Metrologica Sinica, 2017, 38(6): 690-692.
Wang Q Q, Liu J, Peng Z, et al. Laser Beam Divergence Angle Measurement System Based on LabVIEW［J］. Chinese Journal of Lasers, 2012, 39(11): 122-125.
［16］
刘彻. 刀口法测量激光光斑尺寸大小的实验［J］. 通讯世界, 2017(10): 240-241.
Wu S Q, Yang S J, Hu Z X, et al. Research on the measurement and calibration method of vital sign simulator［J］. Acta Metrologica Sinica, 2020, 41(12): 1583-1589.
2023, Vol. 44 
