The acousto-optic tunable filter (AOTF)-based spectrometer has been widely used in hyperspectral imaging applications. The sidelobe phenomenon which is the result of sinc2 shape of the spectral response reduces the quality of the spectral data critically. Especially when a laser appears in the scene, the image point of the laser will be present in images of several bands with varying positions and intensity. This paper discussed the sidelobe phenomenon using the phase mismatching theory and proposed a sidelobe model based on the three-surface AOTF model(TSAM) which was a previous related work. This model provided a simplified method to trace laser light in the AOTF imaging system. A verification experiment was demonstrated, in which a dual-channel AOTF imaging system was introduced. The laser pixel coordinate and DN value were extracted from the panchromatic image and were put into the proposed model, which gave the predicted positions and DN values in different bands. The measured values were extracted from the spectral images. Results showed that the predicted values were in g

Date Published: 12 December 2018
PDF: 6 pages
Proc. SPIE 10849, Fiber Optic Sensing and Optical Communication, 1084907 (12 December 2018); doi: 10.1117/12.2503260

Published in SPIE Proceedings Vol. 10849:
Fiber Optic Sensing and Optical Communication
Jie Zhang; Songnian Fu; Qunbi Zhuge; Ming Tang; Tuan Guo, Editor(s)