Low-light-level night vision technology, as the sign of the development of national military science and technology, has received extensive attention in recent years. However, the gray-scale level images provided by traditional low-lightlevel night vision devices are unable to meet the requirements of modern war, color night vision technology developed accordingly. This article mainly discusses the development of night vision technology and several technical methods for obtaining color night vision images, including indirect methods based on color conversion or fusion, and direct methods based on hardware, which provides reference for researchers to understand the color night vision technology.
In order to study the properties of the organic membrane as the substrate of the Al2O3 ion barrier film, the micro-micromorphology of organic membrane with different thickness was analyzed by step tester and metallographic microscope, and study the influence about the thickness of the organic membrane on the electrical characteristics of the MCP. The experimental results show that as the thickness of the organic membrane increase, the continuity and compactness of the organic membrane increase; and the loss of the current gain of the ion barrier MCP also increase. When the current gain of MCP without ion barrier film was 16000, and the thickness of organic membrane is 121nm, the current gain of the MCP with the ion barrier film was reduced by 94%.
Based on a large number of research results on ICCD/ICMOS, this paper summarizes and summarizes the performance evaluation of ICCD/ICMOS and the main features of the product. Firstly, based on the definition of ICCD/ICMOS, the development and application background of this kind of digital LLL detector are described. Then, relevant research results are summarized from 12 aspects, including system resolution, signal-to-noise ratio, static imaging quality, system modulation transfer function, photoelectric response uniformity, quality factor, Moire fringe, photo-energy coupling efficiency, seismic characteristic, photoelectron gain, dynamic range and spectral response. This can not only serve as the basis for the inspection and evaluation of this kind of products, but also help us to have a deeper understanding of this device, which has certain guiding significance for promoting its development and progress.
Rb+, Cs+ and other alkali metal ions in the Micro-channel Plate(MCP)channel, under the action of an electric field, leave out of the channel wall of MCP, and accelerate to input surface of channel along the opposite direction of the electric field to form ion feedback-induced noise. The feedback ions will cause great harms, it will bombard the cathode surface, resulting in decreased cathode sensitivity, reducing tube life, so you must take measures to reduce ion feedback-induced noise. This paper analyzes how to reduce ion feedback-induced noise from five aspects of the MCP materials, etching, annealing in hydrogen, high-temperature baking and electron scrubbing. Through the utilization of mixed alkali effect of suppressing mutual diffusion and decreasing internal network cavity to improve structure of MCP glass wall, the diffusion coefficient of each ion is reduced; the content of Al2O3 is reduced to reduce the Na+, K+ diffusion losses; etching process is optimized, except for the acid corrosion, the alkali corrosion, special acid etching and vacuum baking process are used; annealing in hydrogen technology is also optimized, the time of annealing in hydrogen was chosen on 270 ~ 350 minutes; and the vacuum baking and electron scrubbing are handled before manufacturing. By the above methods the ion feedback-induced noise is reduced.
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