Patent ID: 7619727

Claim:
A device for measuring wavelength and intensity of light applied by a light source, comprising: a main photodetector for detecting the intensity of the light applied by the light source and outputting a corresponding signal; at least one optical filter for selecting the wavelength of tight transmitted to the main photodetector from among wavelengths applied by the light source, the light satisfying an established transmission wavelength; at least one sub photodetector for detecting the intensity of the light transmitted through the optical filter, and outputting a corresponding signal, the sub photodetector corresponding to the optical filter; a wavelength discriminator for discriminating the wavelength of the light source based on the signal output by the sub photodetector; and a light measurement unit for measuring the intensity of the light source that is the intensity of the light corresponding to the discriminated wavelength based on the signal output by the main photodetector, wherein the light measurement unit calibrates the signal output by the main photodetector according to the wavelength of the light source discriminated by the wavelength discriminator, and measures the intensity of the light source based on the calibrated signal.