The microscopic model and most optical properties of ensembles of the N-V− centers have been firmly established in the 1970s based on the optical measurements combined with uniaxial stress and on the electron paramagnetic resonance.
N-V−-tsentri ansamblite mikroskoopiline mudel ja enamik optilisi omadusi on leidnud kinnitust 1970. aastatel, tuginedes optilistele mõõtmistele kombineeritud üheteljelise pinge ja elektroni paramagneetilise resonantsiga.