Light measuring system C9920-12

optical

Light emitting materials are characterized by their fluorescence quantum yield. For light emitting devices like organic and inorganic LEDs the respective physical value is the external quantum efficiency, measured usually by electroluminescence (EL) method. For this application the external quantum efficiency measurement system C9920-12 is designed. Integrating sphere : 3.3 inch inside diameter, reflective material: Spectralon Detector : BT-CCD Cooling temperature : -15 ℃ Number of photosensitive device channels : 1024 ch Wavelength : 380 nm to 780 nm (Detector: 200 nm to 950 nm) Fiber length : 1.5 m Range of measurement for luminous flux : 0.00013 lm to 0.12 lm (with an emission area 2 mm square and white light)