Art Inspection:
|
| Underdrawing image taken with SUI's SU320M-1.7RT Notice the details in the top hat and face. Renoir's accountant was originally facing in, but after a fallout with the artist, he was painted facing out. |
Applying NIR Inspection To Image Underdrawings
SUI has applied its solid-state Indium Gallium Arsenide (InGaAs) camera to the fields of art history and conservation. Non-invasive (remote) examination of art objects including paintings, manuscripts, textiles, etc., can be easily accomplished in the Near Infrared (NIR) spectrum with the model SU320M-1.7RT. Many paints which are reflective in the visible spectrum are transparent in the NIR. The SU320M-1.7RT "sees" through the paint, and images the "underdrawing".
Numerous artists composed a preliminary sketch on a canvas or wood panel.
The outline drawings were done with a soot/charcoal substance, which is
highly reflective in the NIR spectrum. This drawing could be changed if
the artist didn't like the result. In the finished painting these outlines
were covered by the paint, and thus invisible..
|
| The images above show an oil painting of sunflowers as viewed with a visible CCD camera (on the right) and in the NIR with a SU320M-1.7RT (on the left). Please call SUI to have a demonstration at your site. |
Infrared Reflectometry (IRR) using SUI's solid-state detector technology has helped to understand the style and techniques of numerous artists. Renoir's "Luncheon of the Boating Party" at the Phillips Collection, Washington, DC was examined with IRR to show what was previously invisible to the naked eye.
The SU320M-1.7RT has both a video output for direct interface to standard
monitors and VCRs and a digital output for integration into a customer's
computer. The camera is superior to any other solid-state or vacuum tube
in the NIR spectrum. It is lightweight, easily transportable, requires
no cooling, and does not exhibit defects such as image lag, persistence,
blooming, low damage threshold, or tube wear-out.
[ back to top ]
Laser Beam Profile:
|
| A 1550nm laser diode profile using the SU320M-1.7RT Camera (left) and Near Field imaging of waveguide structures at 1550 nm using the SU320M-1.7RT (right). |
[ back to top ]
Silicon Wafer Inspection:
|
| The SUI SU320M-1.7RT Camera looking through a 12" unprocessed Silicon wafer (left), processed Silicon wafer in the Near Infrared using the SU320M-1.7RT Camera (middle), and processed Silicon wafer in the Visible (right). |
[ back to top ]
Ice Detection:
|
| False color image of an ice covered aircraft using the SU128-1.7RT focal plane array. (Courtesy Cox and Co. (New York, NY)) |
[ back to top ]
Camouflage Detection:
|
| Visible and Near-Infrared imaging of camouflage and vegetation. Notice how the camouflage does not work in the Near Infrared when the patterns vanish. |
[ back to top ]
Thermal Sensitivity:
|
| Emitted thermal radiation of a soldering iron at 500 degrees Fahrenheit as imaged with the SU320M-1.7RT (left) and Broad band illumination of the same soldering iron using the SU320M-1.7RT (right). |
[ back to top ]