Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
735275 | Optics and Lasers in Engineering | 2009 | 4 Pages |
Abstract
An interferometer composed of a dual-frequency laser, sensing assembly, and decoding system is proposed for angular displacement determinations. The laser is a heterodyne light source. The sensing assembly generates an interference signal by the use of a square prism, and the decoding system extracts the phase difference of the interference signal. The theory, which reveals that the phase difference has a relation with the angular displacement of the square prism, of the interferometer is described. A setup constructed to realize the interferometer and the results of using this setup are then demonstrated and presented.
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Authors
S.T. Lin, W.J. Syu,