Experimental investigation of ghostlines in Fourier spectroscopy in the far-infrared |
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| Affiliation: | 1. School of Computer Science, Guangzhou University, Guangzhou 510006, China;2. Department of Computer Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;3. Shanghai Koal Software Co., Ltd, Shanghai 200436, China;4. School of Science, Hangzhou Normal University, Hangzhou 310036, China;5. State Key Laboratory of Mathematical Engineering and Advanced Computing, Wuxi 214000, China;6. Westone Cryptologic Research Center, Beijing 100070, China |
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| Abstract: | In this work we have investigated the intensity of ghostlines which occur in the spectrum obtained with a two-beam Fourier interferometer when the travel of its moving mirror is periodically distorted. This intensity has been compared quantitatively with the amplitude of the periodic travel distortion as measured directly with a dilatometer, enabling the determination of travel distortions as small as 0.2 μm. It is concluded that the amplitude of the periodic distortion as calculated from the measured intensity of the ghostlines is in fair agreement with the distortion as obtained from a direct measurement. |
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