- A glow observed on a photosensitive surface as a result of light being reflected by the front and rear faces of said surface. This may be observed, for example, as a blur surrounding a bright spot on the screen of a CRT when light is reflected on the front and rear faces of the glass. Also called halo (2).
- On a photographic image, a ring of illumination which appears around the image of a bright object. Also called halo (3).
- synonym halo
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