Enlarged detail of IR images of a medium contrast target located 2 m from the focal plane, with aperture set to . Spacing of superimposed bars is 1 mm. Camera set to: (top) ISO 100; (bottom) ISO 400.
Enlarged detail of IR image of a medium contrast target located 2 m from the focal plane with the camera set to ISO 100. Spacing of superimposed bars is 1 mm. (Top) Lens at ; (bottom) .
Detail of a painting described in the text. (Left) Full 830–1100 nm range of the IR system; (right) at with 1000 nm high-pass filter over the lens, but without manually offsetting the focus to compensate for the additional focus shift at the longer wavelength.
Family Portrait, Lorenzo Lotto, 1523/1524 ( oil on canvas). Image captured in situ using a Canon 5D with 35 mm lens.
IR reflectogram of Family Portrait, Lorenzo Lotto, 1523/1524 ( oil on canvas) captured in situ using modified Canon 30D with 35 mm lens.
Enlargement of the nearest, left portion of the octagonal pattern in Fig. 5. The superimposed bars have a spacing of 1 mm, showing the resolution under these in situ conditions is better than 0.5 mm.
IR reflectogram of the octagonal pattern. The arrows superimposed to the right indicate the three regions, which our previous analysis of this painting has found. Compare this with Fig. 1 of Ref. 37.
(Left) “Saint Nicolas and Saints Catherine, Lucy, Margaret, and Apollonia,” Francesco Botticini, late 15th century ( tempera on panel). (Right) detail of the lower center of the IR reflectogram of the full painting, captured handheld at 1/30 s with ISO at 1600. The measured resolution under these conditions is approximately 1.2 mm.
(Left) Visible light image of a set of Japanese armor located within a protective glass enclosure. (Right) IR reflectogram of the armor. The various materials used in the armor are much more apparent in this image than in the visible due to their optical properties in the IR.
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