In the analysis of complex stratigraphical structures like painted artefact, infrared (IR) techniques can provide precious information about elements hidden under superficial layers of the artwork, such as pictorial features and structural defects. This paper presents a novel complementary use of reflectographic and thermographic techniques for the survey of three baroque paintings, preserved at the Chigi Palace in Ariccia (Italy). First, the IR-ITR laser scanner prototype has been used for the preliminary and remote near-IR reflectographic survey of the areas where the canvas was located. The resulting map was then used for planning the thermographic and mid-IR reflectographic studies, focusing the analyses on the most interesting areas of one of the paintings, called “La Primavera”. The combination of the three imaging techniques revealed several details not visible by the naked eye, such as restored lacunas and pentimenti, demonstrating the validity and complementarity of the proposed combined methodologies.

在对彩绘文物等复杂地层结构的分析中，红外 (IR) 技术可以提供有关隐藏在艺术品表面层下的元素的宝贵信息，例如图像特征和结构缺陷。本文介绍了反射和热成像技术的新颖互补用途，用于调查保存在 Ariccia（意大利）的 Chigi 宫的三幅巴洛克绘画。首先，IR-ITR 激光扫描仪原型已用于帆布所在区域的初步和远程近红外反射测量。然后将生成的地图用于规划热成像和中红外反射研究，重点分析其中一幅画作“La Primavera”最有趣的区域。