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Two-direction reflectance dispersion measuring device for determining brightness characteristics of e.g. newspaper magazines, has source or receiver movable about common axis perpendicular to sample, where source is focusable on sample
Two-direction reflectance dispersion measuring device for determining brightness characteristics of e.g. newspaper magazines, has source or receiver movable about common axis perpendicular to sample, where source is focusable on sample
The device has a light source (3) illuminating a sample (2) under specified elevation, and a photo receiver (4) that is movable relative to the light source. The photo receiver receives light from the sample, and contains a set of receiver units for simultaneous detection of a latitudinal elevation angle range. The light source or the photo receiver is movable about a common axis (5) that is perpendicular to the sample, where the light source is focusable on the sample. An independent claim is also included for a transmittance measuring device arranged for receiving light coming through a sample.
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