其他

颜料是了解艺术品历史背景的重要线索。本应用介绍了使用 XGT-9000SL 对文森特·梵高的油画“蓟花花瓶”进行元素成像。结果表明这幅画上使用的颜料的元素组成与之前报道的梵高使用的不同，表明这幅画只是艺术品的复制品。

Tips and Tricks for Photographing Images with a forensic light source

In this study we have chosen to investigate pyrite and its surrounding minerals in order to identify the different mineral phases as well as the chemical variations from micro- to nano-scale. Using the different microscopes instruments and being co-localized allows a comprehensive characterization of the sample and a precise superimposition of all the images.

The simplest and most important rule for photographing evidence with an FLS is “What You See is What You Get”. However you see the evidence is exactly as the camera should see it.

用于首饰的宝石通过加热、辐射或填充裂纹等工艺来处理，可使其更加完美。我们使用XGT-9000 微区X射线荧光分析仪对Mineralab公司提供的红宝石进行了成像分析。通过透射X射线成像结果，可发现红宝石内部存在部分缺陷，而荧光X射线成像则显示出红宝石表面经过填充处理，其中包括Pb、Mg和Si等代表铅玻璃的物质。

The main application regarding Questioned documents and the use of alternate light sources revolve around “ink differentiation”. Many inks have different formulations, even within the same apparent color type. A tunable forensic light source can be used to identify slight variations in ink type by viewing ink responses as the color of the light is tuned through the visible and infrared regions.

刑侦光源多波段光源是检测荧光和非荧光痕量物证的有效工具。

在弹药和炸药中都发现了几种不同类型的残留物，它们会发出荧光。通过使用可调的刑侦光源，可以在不接触表面的情况下对物品进行观察，以查看是否存在荧光残留物。

受害者身上的瘀伤细节，例如咬痕或鞋印，可以将嫌疑人与受害者联系起来。此外，嫌疑人手掌上瘀伤的细节可以将嫌疑人与武器联系起来。

从以往的经验来看，刑侦光源主要用于增强对现场指纹的发现。使用荧光增强过程补充光源大大拓宽了可以发现现场指纹的表面类型。