A method of obtaining high dynamic range, spectrally, spatially and angularly resolved radiance of a sample surface of a sample by an electromagnetic irradiator irradiating electromagnetic radiation of controlled spectral distribution onto the sample surface and, using an electromagnetic sensitive sensor to register the reflected spectral distribution. The spectral distribution of the intensity of the electromagnetic field is modeled to have been reflected by a plurality of spatially well defined part-surfaces of the sample surface. The electromagnetic sensitive sensor being well-defined in terms of the functional dependency between input radiation and output signal and the registering exposure time-period being selected individually for each individual sensor element, such as to compile an information volume that represents the registered high dynamic range spectrally resolved electromagnetic radiance as a function of the position of the part-surfaces within the sample surface and of the respective angle enforced on the sample while measuring.