Luminous flux measuring apparatus using an integrating hemispher

Details Luminous flux measuring apparatus using an integrating hemispher Luminous flux measuring apparatus using an integrating hemispher

1993-11-08

1995-07-04

Rosenberger, Richard A.

Optics: measuring and testing

Photometers

Integrating spheres

250228, G01J 104

Patent

active

054305403

ABSTRACT:
A luminous flux measuring apparatus includes an integrating hemisphere which has a hemisphere shape and an inner wall. The inner wall has a light diffusing material applied thereto. A flat mirror is installed to cover the first opening of integrating hemisphere. A second opening is located at the center of the flat mirror and the window has the same configuration of longitudinal cross section of the illuminant to be measured. A light detector which has a light-intercepting window is located inside the integrating hemisphere. Finally, the flux measuring apparatus includes a means for holding the illuminant in the window of the mirror at the center of curvature of the integrating hemisphere.

REFERENCES:
patent: 4378159 (1983-03-01), Galbraith

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