Imaging Systems Calibration Laboratory
Calibration is the process of assigning engineering units and uncertainties to digital counts (or meter deflections if measuring a current/voltage/resistance, etc.) such that an instrument reading (or image format) conforms to a recognized standard such as radiance, for example. It is an important aspect of radiometry and image acquisitions. Recently, DIRS has established a state-of-the-art Optical Calibration Facility which is poised to be a strategic asset for both research and academics in DIRS. We currently have a NIST-traceable, custom 20 inch integration sphere from Labsphere, Inc. This is the heart of our current radiometric calibration capability in terms of flat fielding, linearity assessment and absolute calibration. We recently acquired an Optronics Labs OL 750 Automated Spectroradiometric Measurement System. This will allow us to perform spectral measurements, such as relative spectral response (RSR) from 0.4 to 2.5 m on camera and single-element detector (i.e., photodiodes) systems. We also have the capability to assess wavelength calibration using our Argon and Mercury (Neon) set of spectral emission lamps. Future capabilities include the incorporation of a collimator (VIS-LWIR) so as to perform spatial detector/imaging system analysis and calibration along with the development of a course on calibration.