Chinese Optics Letters, Vol. 5, Issue 3, 128 (2007)
Reduction of interference fringes in absorption imaging of cold atom cloud using eigenface method
[in Chinese]1,2, [in Chinese]1,2, [in Chinese]1,2, and [in Chinese]1,2
- 1Key Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
- 2Center for Cold Atomic Physics, Chinese Academy of Sciences, Shanghai 201800
Eigenface method used in face recognition is introduced to reduce the pattern of interference fringes appearing in the absorption image of cold rubidium atom cloud trapped by an atom chip. The standard method for processing the absorption image is proposed, and the origin of the interference fringes is analyzed. Compared with the standard processing method which uses only one reference image, we take advantage of fifty reference images and reconstruct a new reference image which is more similar to the absorption image than all of the fifty original reference images. Then obvious reduction of interference fringes can be obtained.