We are developing new detector-based radiometric scales in the near infrared to extend existing spectral radiant power calibrations to spectral irradiance and radiance calibrations. High accuracy irradiance and radiance meters have been developed to realize these new detector-based radiometric scales. Mechanical, optical, and radiometric design considerations of Ge and InGaAs radiometers are discussed. Calibration principles and design considerations of the calibration setup are also described. Several results of preliminary radiometric characterizations are reported.© (1996) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.