Patent ID: 9746370
Date: 2017-08-29
CPC Classifications: G01J,H05B

Claim:
1. A method for measuring illumination characteristics of a first luminaire comprising: providing a luminaire mounting location and a surface upon which an array of photodetectors is disposed, each photodetector in the array having a known position, the surface being oriented to allow a first luminaire at the luminaire mounting location to illuminate the array of photodetectors; determining, by a processor of a computer, responsiveness of the photodetectors in the array of photodetectors to illumination characteristics of the first luminaire, to thereby provide measured illumination data; using, by the processor of the computer, calibration constants for each photodetector to calculate a luminous intensity at a horizontal angle and a vertical angle of each photodetector; mounting a second luminaire having known illumination characteristics at the luminaire mounting location; determining, by the processor of the computer, responsiveness of the photodetectors in the array of photodetectors to the known illumination characteristics of the second luminaire, to thereby provide a calibration illumination data set; calculating, by the processor of the computer, calibration factors of each photodetector from the calibration illumination data set based on the known illumination characteristics of the second luminaire; and storing, by the processor of the computer, results of a comparison of measured output data in a computer system memory to thereby provide a set of scaling factors for each of the photodetectors.