Spectral Irradiance Meters

Spectral irradiance meters are preferable to traditional filter based irradiance instruments for analytical measurements because they acquire hundreds of data points across the visible spectrum. They provide you with the precision required to accurately measure narrow bandwidth LEDs and discontinuous light sources.

Although filter based instruments are desired for certain properties such as cost, speed and portability, they only acquire three data points across the entire spectrum of light to yield radioimetric values by using filters that correspond to the normal human eye response. These filters can only be manufactured to a certain degree of accuracy, therefore filter based meters are susceptible to errors. Additionally, filter based instrumentation lacks the resolution needed to accurately describe narrow bandwidth light sources. Having multiple sensors enables spectral irradiance meters to measure the entire spectrum simultaneously and directly calculate all pertinent radiometric data, making it the ideal choice for evaluating LEDs, which are today’s dominant light source.