Abstract: A standardization device for calibrating a spectroscopic apparatus. The spectroscopic apparatus includes a light source, an optical device to be standardized, and a sensor. The standardization device includes an optical standardization device, an adaptor, and an optical fiber. The optical standardization device transmits at least one monochromatic light beam. The adaptor is removable disposed within the spectroscopic apparatus and interposed between the optical device to be standardized and the optical standardization device. The adaptor transmits the monochromatic light beam between the optical standardization device and the optical device to be standardized. One end of the optical fiber is connected to the standardization device while the other end is connected to the adaptor. The optical fiber transmits the monochromatic light beam between the optical standardization device and the adaptor.