Imaging Colorimeter meets the various measurement needs of FPD, backlit keyboards, and LED lighting. RayClouds provides C-Series Imaging Colorimeter and L-Series Imaging Luminancemeter. C-Series Imaging Colorimeter provide excellent luminance and color measurement and L-Series Imaging Luminancemeter is ideal for high precision, high speed luminance measurement. Luminance Photometer is based on a scientific-grade CCD sensor with high resolution. The sensor enables pixel-level measurements of the FPD and measurement of backlight, keyboard characters, automotive panel luminance differences, and high-precision LED luminance and chromaticity measurements. Defects such as luminance spots, dark spots, and light leakage on the display screen can be detected.