Objective method of measuring resolution of image intensifier tubes

• Autorzy: Chrzanowski Krzysztof , Stafiej Bolesław

Identyfikatory

DOI

10.24425/mms.2024.149704

• Języki publikacji: EN

Abstrakty

EN

Image intensifier tubes (IITs) are the most important modules of night vision devices used in huge numbers by military forces worldwide. Resolution is the most important parameter of IITs that presents information about ability of these devices to produce output images preserving information about details of the observed scenery. Despite its importance, it is still a common practice to measure resolution subjectively, by an observer looking at image of a resolution target created by a tested IIT. A series of attempts have been carried out to develop objective methods for accurate resolution measurement of IITs but with limited success. Accuracy of these methods varies depending on the tested IIT. This paper presents detailed analysis of proposed methods for objective resolution measurement. This analysis has shown that significant variability of accuracy of these methods is caused by one main drawback: the methods do not take into account influence of the spatial noise effect on human perception of image of the resolution target. Thus, an improved method taking into account spatial noise and its impact on target detection has been proposed. The method has been validated through experimental verification that shows accuracy improvements compared to other objective methods. This new approach improves accuracy of measurement of resolution of IITs to a level that can be accepted at professional test stations. In this way, this new method has potential to replace the standard subjective method to measure resolution of IITs and fix the biggest flaw of the standard test stations: measurement subjectivity.

Słowa kluczowe

EN

image intensifier; IIT; resolution measurement; subjective resolution; objective resolution

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2024
• Tom: Vol. 31, nr 2
• Strony: 339--352
• Opis fizyczny: Bibliogr. 25 poz., rys., tab., wykr., wzory

Twórcy

autor

Chrzanowski Krzysztof

• Military University of Technology, Institute of Optoelectronics, 2 Kaliskiego Str., 00-908 Warsaw, Poland
• INFRAMET, Bugaj 29a, Koczargi Nowe, 05-082 Stare Babice, Poland

• https://orcid.org/0000-0002-9857-8235

autor

Stafiej Bolesław

• INFRAMET, Bugaj 29a, Koczargi Nowe, 05-082 Stare Babice, Poland

Bibliografia

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Uwagi

The research presented in this paper was funded by the National Centre for Research and Development of Poland (grant no. POIR.01.01.01-00-0173/20-00).