基于紫外增强空间光调制技术的单光子计数成像探测系统
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关键词：短波光学；紫外成像；单光子计数成像；空间光调制；耦合成像；高灵敏度探测中图分类号：O439；TH74 文献标识码：Adoi：10.37188/OPE.20263401.0044 CSTR：32169.14.OPE.20263401.0044
Single-photon-counting imaging detection system based on UV-enhanced spatial light modulation technology
GUO Naifei1， SUN Liang1， HELingping1， MA Tianqi1， TAO Chen1，WANG Wei1， YAN Wanhong12 （1. Changchun Institute ofOptics， Fine Mechanics and Physics， Chinese Academy of Sciences， Changchun 130033， China; 2.University ofChineseAcademy ofSciences，Beijing1OoO49，China） * Corresponding author，E-mail： 18844189973@163. com
Abstract：To meet the increasing demand for high-sensitivity，large-dynamic-range detection in space weather monitoring，ultraviolet （UV） early-warning reconnaissance，and advanced analytical instrumentation，a single-photon-counting UV imaging detection system is presented. High sensitivity and low noise in theUV band are achieved by integrating an array single-photon counter with a UV-enhanced digital micromirror device（DMD） featuring small pixel size and a high spatial light-modulation rate.Dynamic adjustment of spectral sequences on a per-pixel basis is enabled，and pixel-level modulation of incident pho tons is implemented atthe array single-photon counter.When weak target spectral signals are identified，an encoding modulation strategy is applied to improve the signal-to-noise ratio （SNR）within the target imaging region.Based on region identification and spatial-domain correlation，multi-leveliradiance control is imposed on corresponding sensor pixels，allowing saturated regions to be rapidly driven into the optimal response range. The coupled internal optical architecture is described，and key performance metrics including wavelength range，dark count rate，and dynamic range are evaluated.Experiments demonstrate a response wavelength range of 180-320nm ，a dynamic range of 163.9dB ，a dark count rate of O.481 cps/cm2 ，and a system transfer function exceeding O.6，consistent with the design targets. The developed system supports high-sensitivity UV spectral imaging with low dark counts， fine spatial resolution，and high-speed spatial modulation，providing enabling technology for high-sensitivity UV imaging applications in China.
Key words： shortwave optics； UV imaging detection; single-photon-counting imaging； spatial light modulation;coupled imaging;high-sensitivity detection
1引言
日盲紫外波段成像探测技术在地球表面太阳背景辐射近乎为零，因此在空间天气监测、高压电晕检测、导弹预警领域中具有不可替代的优势[1-2]。（剩余10703字）
