LI Dong-guang, ZHANG Guo-xiong. Measurement and compensation for refractive index of air using a pre-evacuated airtight sealed cavity[J]. Editorial Office of Optics and Precision Engineering, 2001,(1): 80-84
LI Dong-guang, ZHANG Guo-xiong. Measurement and compensation for refractive index of air using a pre-evacuated airtight sealed cavity[J]. Editorial Office of Optics and Precision Engineering, 2001,(1): 80-84DOI:
The compensation effect for refractive index of air is the "bottle neck" factor in improving the accuracy of interferometric measurement. The theory of compensation for refractive index of air is analyzed. Several methods for measuring refractive index of air are analyzed and effectiveness of compensation is compared. Based on these results
an interferometric device to measure the refractive index of air without air evacuation in the measuring process is studied. A pre-evacuated airtight sealed chamber with 45皊lope is employed. It is testified that the method is effective and the measuring accuracy is improved by the experiments of measuring and compensating for refractive index of air.
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