Patent ID: 6342947
Filing Date: 2002-01-29
Classification: G01J

Abstract:
An optical power high accuracy standard enhancement (OPHASE) system for comparing the optical power output of a unit under test (UUT) against the optical power output of a pre-selected calibration standard, the standard having a first detector head, that enable the calibration of the UUT to have identical reading as the calibration standard at a given power level and wavelength of input beam, said OPHASE system comprising: a source of input beam; a high-repeatability switch, said switch being capable of routing input beam selectively into first and second optical paths; a means for providing said optical paths, said first optical path extending between said switch and the calibration standard and said second optical path being movable to extend selectively between said switch and the calibration standard or between said switch and the UUT; and a means for coupling the input beam from said source to said switch.