Research on Measuring Gas Refractive Index with Microcomputer in Real-Time Based on Michelson Interference Theory

Abstract:

When putting a gas cylinder on the light path of a Michelson interferometer, the changes of the cylinder's gas pressure will make a difference to the optical path of the two beams of light, which finally changes the number of the interference fringes. Based on the principles above, a new method was forward a to measure gas's refractive index in this research. First, use a linear CCD (Charge Coupled Device) as photoelectric sensor to capture light signal, then, turn the electrical signal from photoelectric sensor into digital signal, which would later be transferred to microcomputer through USB interface. Finally, figure out the gas's refractive index in real-time using microcomputer.

• Periodical: Applied Mechanics and Materials (Volumes 239-240)
• Pages: 233-237
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.239-240.233
• Online since: December 2012
• Authors: Hua Xiao, Xiao Lan Chen, Shao Na Zhou, Jian Jun Qi
• Keywords: Gas Refractive Index, Linear CCD, Michelson Interferometer, Microcomputer

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