title: Instrument for measuring angular intensity distributions of light sources within a few milliseconds.
abstract: An instrument is described that allows measuring within a few milliseconds the angular intensity distributions of light sources, particularly light scattering objects. The basic idea is to achieve a rapid rotation of the direction of observation by means of a rotating prism and two conical reflecting surfaces. The photosensitive detector as well as the light source remain fixed. Light scattering experiments done with a suspension of polystyrene latex spheres demonstrate the operation of the instrument. The short measuring period is of special importance for the investigation of small particles in time-dependent processes or for serial analyses.
authors.forename: H O
authors.initials: HO
authors.lastname: Moser