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艺术品历史学家和修建恢复者在研究一幅出自原艺术家之手的古画时或者在试图检验数百年来人们进行修改的情况时,用近红外(NIR)反射图成象技术使一些底稿或早期的版本显现了出来。 这种反射照明成象技术基于一种近红外光导摄象管电视摄象机。大多数绘画材料对于1至2μm的光谱范围或多或少是透明的,而底稿,特别是采用碳材料的底稿,能够吸收这一光谱范围的光。颜料不完全透明这一情况并非始终是一个缺点,
When art historians and restorers are working on an ancient painting from the hands of the original artist or while trying to test the way people make changes for hundreds of years, NIR reflectance imaging techniques have made some Manuscripts or earlier versions appear. This reflected illumination imaging technique is based on a near-infrared light-guide tube TV camera. Most of the painting materials are more or less transparent to the spectral range of 1 to 2 μm, while the manuscripts, especially those using carbon materials, are able to absorb light in this spectral range. The fact that pigments are not completely transparent is not always a drawback,