High-accuracy long distance alignment using single-mode optical fiber and phase plate
✍ Scribed by Qun Hao; Dacheng Li; Yongtian Wang
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 317 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0030-3992
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✦ Synopsis
A long distance alignment technique is developed using the combination of a single-mode optical ÿber and a phase plate. The characteristics of the di raction pattern of a Gaussian beam passing through a step phase plate are analyzed theoretically. The feasibility of the method is validated in theory and with computer-simulation, and the factors a ecting the alignment precision are discussed. The reliability of the alignment technique is demonstrated when it is used in the measurement of the straightness of a 12 m-track, in which measured results using the new technique coincide very well with those using an HP5528 dual frequency laser interferometer.