Luminance Gain Prediction Model of Low-light-level Image Intensifier in Humid and Hot Environment

LI Chenggang; ZENG Bangze; LIU Jian; YANG Yuping; XIAO Jianjun; LI Yehan; YANG Pinjie; ZHAO Yuanrong

doi:10.7643/ issn.1672-9242.2026.02.017

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Equipment Environmental Engineering ›› 2026, Vol. 23 ›› Issue (2) : 147-153. DOI: 10.7643/ issn.1672-9242.2026.02.017

Environmental Test and Observation

Luminance Gain Prediction Model of Low-light-level Image Intensifier in Humid and Hot Environment

LI Chenggang^1,2,3, ZENG Bangze^1,2,3, LIU Jian^1,2,3, YANG Yuping^1,2,3, XIAO Jianjun^1,2,3, LI Yehan^1,2,3, YANG Pinjie^1,2,3, ZHAO Yuanrong^1,2,3

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Abstract

The work aims to predict the variation of brightness gain of low-level light intensifiers with test time considering two environmental factors: temperature and humidity. Taking the ϕ18 mm low-light-level intensifier equipped with GaAs photocathode and ion barrier film as the research object, a 27-month atmospheric exposure test was conducted under sheds in Xishuangbanna, Yunnan. Referring to relevant military standards (GJB 8893.3-2017 and GJB 2000A-2020), the brightness gain at different cycles was tracked and tested. Based on experimental data, an Exponential-Gaussian decay model was constructed by combining the exponential decay model with the Gaussian model, and temperature and relative humidity were introduced for residual correction. The results showed that its performance degradation exhibited the characteristic of “rapid degradation in the initial stage-fluctuating recovery in the middle and late stages”, with model goodness of fit R²≥0.903, and a prediction accuracy of 94.526%. Life prediction indicated that the storage life of this intensifier exceeded 4.75 years in hot and humid environments. The established model can accurately describe the performance degradation process of low-level light intensifiers in hot and humid environments, revealing the influence law of humid and hot environments on their performance. It can provide theoretical support for reliability assessment, life prediction, and forward design of this device.

Key words

low-light-level image intensifier / humid and hot / luminance gain / Exponential-Gaussian decay model / performance degradation / shed exposure test / life prediction

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LI Chenggang, ZENG Bangze, LIU Jian, YANG Yuping, XIAO Jianjun, LI Yehan, YANG Pinjie, ZHAO Yuanrong. Luminance Gain Prediction Model of Low-light-level Image Intensifier in Humid and Hot Environment[J]. Equipment Environmental Engineering. 2026, 23(2): 147-153 https://doi.org/10.7643/ issn.1672-9242.2026.02.017

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