Here, we report a long-lived ms time scale decay luminescing in the near infrared >800 nm present in productions of ‘white’ colourless, facetted yittrium stabilized cubic zirconia and observed using time-gated imaging. The spectrum of the strong luminescing feature also has characteristics of Neodymium (Nd³⁺) and has a multiexponential decay behaviour. Real-time detection of cubic zirconia mounted in diamond jewellery containing very small stones (≤0.01 ct) is made possible, where observation by loupe is more challenging or other conventional techniques impractical and or slow to implement. The near infrared observed can be excited using a low-cost and eye/skin safe-visible green LED light source and the time-gated imaging of the luminescence using a machine vision monochrome camera. The use of near infrared, time-gated detection in combination with other verification instruments increases the robustness of screening diamond parcels. Therefore, it is recommended that any stone exhibiting strong delayed luminescence in the near infrared be treated with caution, as this is not a typical feature found in this precious gemstone. In this case, the instrument developed was expanded to incorporate a white LED illumination ring as a viewfinder, in order to aid the inspection of loose and mounted configurations.

中文翻译：

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通过门控成像实时检测无色立方氧化锆中的长寿命近红外发光

在这里，我们报道了存在于“白色”无色，多晶面钇稳定立方氧化锆中的存在于近红外> 800 nm中的长寿命ms时标衰减衰变发光，并使用时间门控成像进行了观察。强发光特性的光谱也具有钕（Nd ³⁺），并且具有多指数衰减行为。实时检测镶嵌在包含非常小的宝石（≤0.01ct）的钻石珠宝中的立方氧化锆成为可能，在这种情况下，用放大镜观察更具挑战性，或者其他常规技术不切实际或实施缓慢。可以使用低成本且对眼睛/皮肤安全可见的绿色LED光源激发观察到的近红外光，并可以使用机器视觉单色相机对发光进行时间门控成像。将近红外，定时选通检测与其他验证工具结合使用，可以提高筛选钻石包裹的可靠性。因此，建议谨慎处理任何在近红外光中表现出强延迟发光的宝石，因为这不是这种珍贵宝石的典型特征。在这种情况下，