Vasco Ronchi

Italian physicist

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July 13, 2026

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Vasco Ronchi was an Italian physicist known for his work in optics. He proposed a definition of an image as any recognizable nonuniformity in light distribution, emphasizing that sharper images have greater nonuniformity. This perspective diverged from earlier concepts that viewed images as formed by the crossing of light rays from individual object points. Ronchi's definition is particularly useful in understanding image quality in terms of spatial frequency and contrast.1

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optics
Historical background
In 1957 the Italian physicist Vasco Ronchi went the other way and defined an image as any recognizable nonuniformity in the light distribution over a surface such as a screen or film; the sharper the image, the greater the degree of nonuniformity. Today, the concept of an image often departs…
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In 1957 the Italian physicist Vasco Ronchi went the other way and defined an image as any recognizable nonuniformity in the light distribution over a surface such as a screen or film; the sharper the image, the greater the degree of nonuniformity. Today, the concept of an image often departs…
Read More