Patent ID: 8749774
Filing Date: 2014-06-10
Classification: G01J

Abstract:
1. An integrating sphere photometer comprising: a plurality of photodetectors; an integrating sphere having through-holes formed to correspond to the photodetectors; baffles disposed inside the integrating sphere in front of the photodetectors to be spaced apart from the photodetectors; a photometer disposed at a through-hole; a point-like standard light source disposed at a center region in the integrating sphere, the standard light source is removable from the center region; an adjustment unit adjusting output signals of the photodetectors to have the same output signal with respect to light illuminated from the standard light source when the standard light source is turned on, wherein the adjustment unit comprises preamplifiers configured to amplify output signals of the photodetectors and the photometer wherein gains of the preamplifiers are adjusted such that outputs of the photodetectors match each other while the standard light source is turned on; a directional light source to be measured, wherein the direction light source is mounted at the center region in the integrating sphere when the standard light source is removed; and a summing unit configured to sum the output signals of the preamplifiers and output the summed signals.