| 摘要 |
A scanning light source system for projecting onto each area of a complete painting or other planar subject a beam of light and for moving said beam vertically and horizontally. The vertical movements comprise a succession of sweeps across the painting for the purpose of consecutively illuminating each part of the painting sufficiently strongly so that the whole may be photographically reproduced more satisfactorily than has been possible heretofore, i.e. through the use in combination of Kodak #6121 duplicating film or another gamma 1.0 film, polarizing filters, and a lens aperture of f22 or smaller. The horizontal movements position the light source for each vertical sweep. Said system enables a beam of light to be projected onto each part of the entire surface of the subject painting an angle of greater than 40 DEG and less than 80 DEG , thereby enabling brush-stroke and texture detail of a painting to be accurately rendered in a photographic reproduction. Said system also provides even illumination over the whole surface of the subject painting.
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