Patent ID: 7649622

Claim:
A method for testing in parallel a radiant output of a plurality of light emitting devices, the method comprising: a calibration cycle comprising steps of: providing a test system having a master calibrated power meter (CPM), a source transfer standard (STS), and a plurality of secondary, test site power meters (TSPMs); determining a relationship between electrical power supplied to the STS and a radiant output therefrom as measured by the CPM; and calibrating the plurality of TSPMs using the STS and the relationship between the electrical power supplied to the STS and the radiant output therefrom as determined by the CPM; and a testing cycle comprising a step of: positioning a number of devices undergoing test (DUTs) on a test fixture of the test system and positioning the test fixture relative to the TSPMs to test the radiant output of the DUTs.