Optimization of two-color (3 to 5 um and 8 to 12 um) sensor fusion

Hau-Ming Huang; C. K. Chiang; Shi-Chen Chao

doi:10.1117/12.327131

17 July 1998 Optimization of two-color (3 to 5 μm and 8 to 12 μm) sensor fusion

Hau-Ming Huang, C. K. Chiang, Shi-Chen Chao

Proceedings Volume 3374, Signal Processing, Sensor Fusion, and Target Recognition VII; (1998) https://doi.org/10.1117/12.327131
Event: Aerospace/Defense Sensing and Controls, 1998, Orlando, FL, United States

Abstract

A real time (30 frame) two color sensor fusion method utilizes a dichroic mirror to separate incident radiation into 3 - 5 and 8 - 12 micrometer wavebands. The overlapped thermal images created by the dichroic mirror and optical path difference are shifted and made to coincide together directly on the focal plane. This is the basis for developing an optical image coincide technology which can replace the conventional circuit of time delay and integration (TDI). It greatly reduces the deterioration caused by TDI circuits and results in a better image quality. In the experiment, it was found that when several different bandpass filters are inserted into the optical paths, there exists an optimized fusion relationship among the incident power, waveband, detector responsivity and preamplifier gain. If an appropriate adjustment is made the signal to noise ratio of the combined thermal image can be improved a factor above of 30% or more. The performance of the fusion thermal image is better than that of the single waveband, i.e. signal to noise, (SNR), minimum resolvable temperature (MRTD), etc.

Citation Download Citation

Hau-Ming Huang, C. K. Chiang, and Shi-Chen Chao "Optimization of two-color (3 to 5 μm and 8 to 12 μm) sensor fusion", Proc. SPIE 3374, Signal Processing, Sensor Fusion, and Target Recognition VII, (17 July 1998); https://doi.org/10.1117/12.327131

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