Method for estimating operating distance of IR imaging system under sea surface background

Hao Zhang; Chenfei Yu

doi:10.1117/12.2576369

5 November 2020 Method for estimating operating distance of IR imaging system under sea surface background

Hao Zhang, Chenfei Yu

Proceedings Volume 11567, AOPC 2020: Optical Sensing and Imaging Technology; 1156712 (2020) https://doi.org/10.1117/12.2576369
Event: Applied Optics and Photonics China (AOPC 2020), 2020, Beijing, China

Abstract

The traditional operating distance model of infrared imaging system is only valid under the condition that the background is single and invariable. For the sea surface targets, radiation characteristics are affected by the sea-sky-line, specular reflection, sea clutter and so on, resulting in a large calculation error of operating distance if traditional operating distance model was used. In this paper, the operating path of infrared imaging system is divided into chaotic path and methodical path. The chaotic path is the operating path with a certain slant distance from the sea surface target, the infrared radiation propagation characteristics of the target in this path are uncertain, multivalued and volatile, showing certain chaotic characteristics. The methodical path is from observation point of infrared imaging system to the terminal point of chaotic path, the infrared radiation propagation characteristics of the target in this path are certain regularity and linearity, which can be estimated by using the traditional operating distance model. The main work of this paper is to subdivide and characterize the infrared radiation characteristics of the sea surface target in the chaotic path, and finally linearize it in a specific situation, convert the radiation energy of the sea surface target to the starting point of the methodical path, and at last calculate the operating distance according to the traditional operating distance model of infrared imaging system. This method is innovative in theory and can give a reference to the research of infrared system detection range under complex backgrounds.

Citation Download Citation

Hao Zhang and Chenfei Yu "Method for estimating operating distance of IR imaging system under sea surface background", Proc. SPIE 11567, AOPC 2020: Optical Sensing and Imaging Technology, 1156712 (5 November 2020); https://doi.org/10.1117/12.2576369

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KEYWORDS

Infrared imaging

Infrared radiation

Imaging systems

Transmittance

Atmospheric modeling

Signal attenuation

Thermal modeling

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