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| Influence of dynamic pressure on the optical window in laser interferometry |
| LI Bo1,2 ,YANG Jun2,TANG Xiaqing1,HUANG Nan1,3 ,SHI Yusong2 |
| 1.Department of weaponry and control, Academy of Army Armored Forces, Beijing 100072, China；
2.Changcheng Institute of Metrology& Measurement, Beijing 100095, China；
3.China North Vehicle Research Institute, Beijing 100072, China |
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Abstract The optical window is often designed in the pressure chamber when a laser interferometer does the non-contact measurement of dynamic pressure in order to establish optical channels between dynamic pressure and laser interferometer.However, under dynamic pressure environment, optical windows are affected by the internal and external pressure difference, temperature variation, vibration and other factors, which will directly affect the accuracy of optical measurement.To solve the above problem, through simulation analysis, the relationship between the optical window and the pressure, temperature, vibration under dynamic pressure environment was analyzed.At the same time, the optical window was tested under dynamic pressure environment to study the influence of each influential component on the real measurement results, which can modify and compensate for the accuracy of calibration and measurement of dynamic pressure.It also provides a basis for the optical window design under other similar dynamic measurements.
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Received: 06 September 2018
Published: 28 April 2020
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