PLANE TYPE IR BLACKBODY FOR RADIOMETRIC CALIBRATION OF A FTIR HYPERSPECTRAL SPECTROMETER

摘要

The present invention relates to a planar IR blackbody for radiometric calibration of an FTIR hyperspectral spectrometer. The blackbody of the present invention comprises: a disk-shaped heat radiating fin (6) for emitting heat generated when the blackbody is actuated to the outside; a Peltier element (4) attached to the heat radiating fin; an oxygen-free copper plate blackbody surface (3) attached to the Peltier element (4); and a housing (10) encasing the oxygen-free copper plate blackbody surface (3) and the heat radiating fin (6). According to the present invention, the surface of the blackbody is formed in a structure of pyramid for calibrating spectral signals of an FTIR hyperspectral spectrometer to enable a light source having uniform and constant radiation intensity to be emitted from a viewing area and reliable radiation spectrum to be supplied to an area corresponding to each of the pixels of a focal plane-arraying detector. In addition, a Peltier element is used to enable the surface of the blackbody to have a large diameter of 50 mm or more and then be applicable to an FTIR hyperspectral spectrometer which requires a reference light source having a large diameter for calibrating IR signals.