An Infrared Camera Simulation for Estimating Spatial Temperature Profiles and Signal-to-Noise Ratios of an Airborne Laser-Illuminated Target

Orth, David F

ISBN 10: 1025128621 / ISBN 13: 9781025128627

Published by Hutson Street Press, 2025

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Bibliographic Details

• Title: An Infrared Camera Simulation for Estimating Spatial Temperature Profiles and Signal-to-Noise Ratios of an Airborne Laser-Illuminated Target
• Publisher: Hutson Street Press
• Publication Date: 2025
• Language: English
• ISBN 10: 1025128621
• ISBN 13: 9781025128627
• Binding: Hardcover
• Condition: New

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Synopsis

Airborne Laser testing and evaluation can be aided by developing a spectrally-based infrared camera simulation to explore how the target surface's specular and diffuse reflectivities affect the observed signal-to-noise ratio (SNR)and how the target's temperature in the laserspot can estimated. This simulation provides for the observed irradiance, scaled by atmospheric absorption, to consist of the target's self-emission, reflected background emission, and the path emission from the observer to the target. The observed irradiance isscaled and distributed onto a focal plane array by way of a simulated optical system, whose effectsare described by modulation transfer functions. The modeled detector response converts the observed irradiance to a current signal from which detector noise quantities are computed. Analyzing the simulated data shows that the observed SNR is dependent upon the target's reflectivity, and leads to a conclusion that the mid-wave infrared band is best choice for observing the thermal emission. For estimating temperature, a least-squares optimization will not work because of the effects of the point spread function.

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