Broad band VIS+NIR LEDs

Broadbands LED based on a blue LED and “phosphors” have appeared in the market. One example is type SMB1N-BB450 from Roithner LaserTechnik (Vienna, Austria). The primary LED has a peak of emission at 450 nm and the spectrum as a whole covers the range 400 nm to 1000 nm. Except for the prominent blue peak the spectrum is rather flat, making it useful light source for VIS and specially NIR imaging and spectrometry. This LED type seems useful for photography as well as for its intended use is spectrometry. Emission is rather weak and efficiency rather low, emitting 0.3W of…