SPECTRAL SENSING DEVICE AND METHOD FOR MEASURING OPTICAL RADIATION

The invention relates to a spectral sensing device (110) and a method for measuring optical radiation (112). The optical radiation (112) provided by the at least one measurement object (114) comprises non-modulated optical radiation (116). The spectral sensing device (110) comprises at least one radiation emitting element (118), wherein the at least one radiation emitting element (118) is designated for emitting modulated optical radiation (120); at least one photosensitive detector (124), wherein the at least one photosensitive detector (124) has at least one photosensitive region (126) designated for receiving optical radiation (112), wherein at least one detector signal generated by the at least one photosensitive detector (124) is dependent on an illumination of the at least one photosensitive region (126); at least one evaluation unit (128), wherein the at least one evaluation unit (128) is configured for generating at least one piece of measurement information about the illumination of the at least one photosensitive region (126) by the optical radiation (112) provided by the at least one measurement object (114) by using at least one modulated detector signal as generated by the illumination of the at least one photosensitive region (126) by a superposition of the modulated optical radiation (120) and the optical radiation (112) provided by the at least one measurement object (114). The spectral sensing device (110) is arranged in a manner that the modulated optical radiation (120) is guided within the spectral sensing device (110) towards the at least one photosensitive detector (124). The spectral sensing device (110) and a method for measuring optical radiation (112) are configured to perform, preferably in a fully automatized fashion, a self-calibration of the spectral sensing device (110) without requiring any predefined reflection target.