Paper
16 September 2011 Characterization of narrow-band near-IR diodes arranged in array patterns
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Abstract
We examined old, not-well documented paintings before the process of restoration was started, to look for the presence of any invisible signatures and dates, as well as original line drawings and possible painted-over or hidden images. We connected IR LEDs in two-dimensional arrays to allow us to sample the surface of the artwork with approximately uniform illumination, but at different peak wavelengths. We describe the extended area infrared LED illumination sources as to their geometrical arrangement, and their resulting spectral, spatial, and power output characteristics. With these light sources, we were able to make invisible information available for review and critical assessment by the art historians.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Antonio Ortega, Gonzalo Paez, and Marija Strojnik "Characterization of narrow-band near-IR diodes arranged in array patterns", Proc. SPIE 8154, Infrared Remote Sensing and Instrumentation XIX, 815417 (16 September 2011); https://doi.org/10.1117/12.895997
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Cited by 1 scholarly publication.
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KEYWORDS
Light emitting diodes

Infrared imaging

Cameras

Diodes

Infrared radiation

Electromagnetic coupling

Image processing

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