control system. The lines of communication between monochromator, detector output, and computer should be optimized to ensure the desired metrics and features are being used. The commercially available software included with spectroradiometric systems often come stored with useful reference functions for further calculation of measurements, such as CIE color matching functions and the V curve. Applications Spectroradiometers are used in many applications, and can be made to meet a wide variety of specifications. Example applications include: Solar UV and UVB radiation LED measurement Display measurement and calibration CFL testing Remote detection of oil slicks Plant research and development DIY builds It is possible to build a basic optical spectrometer using an optical disc grating and a basic webcam, using a CFL lamp for calibrating the wavelengths. A calibration using a source of known spectrum can then turn the spectrometer into a spectroradiometer by interpreting the brightness of photo pixels. A DIY build is affected by some extra error sources in the photo-to-value conversion: photographic noise (requiring dark frame subtraction) and non-linearity in the CCD-to-photograph conversion (possibly solved by a raw image format). See also Radiometer Spectrometer Spectroradiometry Spectrophotometry References External links Basic Light Measurement Principles An article from International Light Technologies on basic principles Spectroradiometer types Electromagnetic radiation meters Spectroscopy