The BTS256-LED Tester manufactured by Gigahertz-Optik Inc.
measures the luminous flux, color and spectral characteristics of printed circuit board-mounted LEDs, discrete LEDs within a module, miniature lamps, endoscopes and any narrow beam-emitting light source. Larger light sources can be measured by attaching the tester to a larger integrating sphere, and illuminance can be measured with the optional diffuser window attachment. The portable handheld device measures spectral flux distribution in watts per nanometer, peak and dominant wavelength, color temperature, color rendering index and color coordinates (X,Y and u’ v’). The built-in 50-mm-diameter integrating sphere has an exchangeable input optic nozzle to minimize positional error. Other features include an auxiliary LED for test sample absorption factor correction, a remote-controlled shutter for online offset compensation of the diode array and a proprietary bi-tech sensor.