Abstract
The conventional infrared radiometry method can only calculate the irradiance of the extended source, which is no longer applicable when the target size is too small. This paper proposes PSF-based radiometry to realize the infrared radiometry of small targets. From the point spread function (PSF) theory, the relationship between the on-axis irradiance of incoherent light imaging in the image plane and the size of the target is obtained, and then the variance of the PSF is obtained by varying target size. Then, to establish a small-target radiation detection model, the relationship between the variance of the PSF and the target irradiance is obtained by varying the target irradiance. Finally, the experimental results suggest that the measurement error of different irradiance is less than 1.5 %. The error remains within a stable range as the target size decreases and the variance of the error is less than 0.16. Compared with the conventional energy-based method, it proves that the PSF-based method is more accurate and the overall error is lower, which is well suited for the measurement of small-target irradiance.© 2023 Elsevier Science.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
