3 May 2010 The calibration stand for thermal camera module with infrared focal plane array
Author Affiliations +
Abstract
In areas like military systems, surveillance systems, or industrial process control, more and more often there is a need to operate in limited visibility conditions or even in complete darkness. In such conditions vision systems can benefit by using thermal vision cameras. In thermal imaging an infrared radiation detector arrays are used. Contemporary infrared detector arrays suffers from technological imprecision which causes that the response to uniform radiation results in nonuniform image with superimposed fixed pattern noise (FPN). In order to compensate this noise there is a need to evaluate detectors characteristics like responsivity and offset of every detector in array. Some of the detectors in cooled detector arrays can be also defective. Signal from defective pixels has to be in such system replaced. In order to replace defective pixels, there is a need to detect them. Identification of so-called blinking pixels needs long time measurement, which in designed calibration stand is also possible. The paper presents the design of infrared detector array measurement stand allowing measurement of mentioned parameters. Measurement stand was also used to evaluate temporal noise of infrared detection modules. In article there is a description of optical system design and parameters of used reference blackbodies. To capture images from camera modules a specially designed digital image interface was used. Measurement control and calculations were made in specially written IRDiag software. Stand was used to measure parameters for cameras based on cooled focal plane arrays from Sofradir. Results of two-point nonuniformity correction are also presented.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tomasz Sosnowski, Tomasz Sosnowski, Grzegorz Bieszczad, Grzegorz Bieszczad, Henryk Madura, Henryk Madura, Mariusz Kastek, Mariusz Kastek, Krzysztof Firmanty, Krzysztof Firmanty, } "The calibration stand for thermal camera module with infrared focal plane array", Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76603Y (3 May 2010); doi: 10.1117/12.851144; https://doi.org/10.1117/12.851144
PROCEEDINGS
8 PAGES


SHARE
Back to Top