Abstract
There are two bands in the wavelength of 1.55-2.35 μm region for the infrared multispectral camera. Due to the detectors being located on the same focal plane assembly and the design of the readout circuits, one band was found to have crosstalk from other band. Firstly, the crosstalk phenomenon in the infrared multispectral camera image was described and the mechanism of crosstalk phenomenon was investigated. Secondly, based on the aspects of the inner structure of the HgCdTe detector's focal plane array and some important parameters of the detector, it was found that light is reflected and transported by multiple reflections in the focal plane area, which was mechanism of optical and electrical crosstalk phenomenon. Meanwhile, the readout circuits' inaccurate design could also lead to crosstalk phenomenon. Mathematical model was built based on crosstalk phenomenon. The research shows that the crosstalk phenomenon (negative/positive pulse) of B10 is relevant to the step (ascending/descending edge) of B11.At last, the crosstalk math model is validated and relevant correction algorithm is developed.
| Original language | English |
|---|---|
| Pages (from-to) | 1337-1342 |
| Number of pages | 6 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 41 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1 Jul 2015 |
Keywords
- Crosstalk
- HgCdTe detector
- Infrared multispectral camera
- Readout circuits
- Unitary linear regression
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