Patent ID: 9423346
Filing Date: 2016-08-23
CPC Classification: G01N

Claim Text:
1. An apparatus for measuring the haze value of transmissive samples, the apparatus comprising: a first light source selectively configurable to emit a first light beam, a second light source selectively configurable to emit a second light beam, an integrating sphere having an outer surface and an inner surface, the inner surface configured to reflect light incident upon the inner surface, the inner surface further enclosing an interior volume, the integrating sphere is equipped with at least one entrance port configured to allow light from one of the light sources to enter the integrating sphere the integrating sphere having an exit port configured to emit light from the interior volume of the integrating sphere, wherein the exit port is positioned such that light from the first light source exits the integrating sphere without obstruction, and light from the second light source is diffused on the interior surface of the integrating sphere prior to exiting the exit port; a light detector configured to generate a signal when light that has left the exit port of the integrating sphere is incident on the light detector, and a processor configured to activate only the first light source and receive the signal generated by the light detector and activate only the second light source and receive the signal generated by the light detector and calculate a haze value based on the signals generated by the light detector such that wherein k is a stored calibration coefficient value, I