Rheinberg illumination [FBbi_00000293]

Illumination at angles less than the acceptance angle of the image-forming lens is attenuated by a filter to give a colored background of unscattered light; higher angle illumination may be filtered to give a contrasting color
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Rheinberg illumination

ID: FBbi_00000293

Class

Illumination at angles less than the acceptance angle of the image-forming lens is attenuated by a filter to give a colored background of unscattered light; higher angle illumination may be filtered to give a contrasting color

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