Radiometric Calibration Transfer

Integrating spheres show very uniform radiance distribution and are used in a range of applications for the testing and radiometric calibration of imaging and non-imaging systems such focal plane arrays and cameras. One typical application includes the test and calibration of satellite cameras and instruments for multi-spectral and hyperspectral imaging. Often calibration would require downtime and shipment back to the manufacturer’s lab. Since this is rarely practical, customers are looking for a way to calibrate at their location. To meet the needs of integrating sphere owners who have system lamps with high operating hours, light sources more than two years old, or a mandate for annual calibration, calibration on-site can be accomplished with the SR-4500 portable spectroradiometer. With on-site recalibration and certification, there is minimal downtime. The SR-4500 spectroradiometer can be taken to any location. Weighing eleven pounds, it is easy to transport and use on-site, saving time and money and providing accurate and NIST traceable calibration transfer. With a 12″ x 4″ footprint it takes up very little valuable benchtop real estate. The SR-4500 provides an expanded spectral range of 350-2500nm. It includes three thermoelectrically cooled photodiode arrays to work efficiently in a wide range of ambient temperatures and environments (15-40 degrees C). Equipped with DARWin SP Data Acquisition software, it automatically saves scans in ASCII files for use (without pre-processing) by third party analytical software. Collect data with a single click and display reflectance/transmittance data (percentage) or absorbance (logarithmic) versus wavelength. Single and multiple spectral plots are available as well as LabVIEW drivers to create custom applications.

The SR-4500 is ideally suited for radiometric calibration transfer. It offers an expanded UV/VIS/NIR range, with the following features:

  • SR-4500- 350-2500nm – three TE-cooled photodiode arrays (1 Si/2 Extended InGaAs)
  • USB and wireless Bluetooth communications
  • 1.2 meter metal clad fiber optic cable with SMA-905 connector
  • Variety of fiber optic lenses including 1, 2, 4, 5, and 8 degree