Chinese Optics Letters, Vol. 2, Issue 8, 08453 (2004)
Average modulation transfer function of line-array fiber-optic image bundles
Hui Wang1,2,3,*, Yang Xiang1, and Bingxi Yu1
- 1State Key Lab for Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033
- 2Graduate School of the Chinese Academy of Sciences, Beijing 100039
- 3Aviation University of Air Force, Changchun 130022
The imagequality evaluation in fiber-optic image bundles was addressed by the modulation transfer function (MTF). With the definition of the contrast transfer function (CTF), the MTF model of line-array fiber-optic image bundles was established and analyzed numerically. The average MTF was carefully evaluated by considering the influence of phase match on the MTF between input pattern and fiber-optic image bundles. In this paper, the average MTF is mean arithmetical value on the MTFs of eight different phases. The results show that, for certain fiber diameter and spatial frequency, the relationship between the core diameter and the average MTF is inverse proportion; for certain fiber cladding thickness, the relationship between the core diameter and the average MTF is also inverse proportion. And at Nyquist frequency, the MTF value is near 0.5.
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