Agency/Department

FLC Region

Security Lab

No

Address

4555 Overlook Avenue S.W.
Washington

(P)

202-767-3083

Description

FUNCTION: Enables the optical characterization of IR materials and precise calibration of IR radiometric and spectroscopic instrumentation.

DESCRIPTION: The Infrared/Electro-Optical Calibration and Characterization Laboratory is an essential element of NRL's IR signature measurement and signature control programs. Naval Sea Systems Command-supported ship signature measurement and ship decoy development programs rely on this laboratory for accurate calibration of instruments such as interferometer spectrometers,circular variable filter radiometers, and IR imaging radiometers. This facility provides the capability for characterizing the surface emissive and reflective properties of IR paints and materials. Measurements are made on transmittance, specular reflectance, diffuse reflectance, and bidirectional reflectance.

INSTRUMENTATION: Included are state-ofthe-art instruments and devices. Calibration is carried out with precision IR calibration sources and a 24-in.-diameter, 200-in. focal length, off-axis collimator. Equipment currently in use includes a Bomem MR254 Fourier transform infrared (FTIR) spectrometer equipped with multiple detectors allowing measurements in several IR bands. Using integrating spheres for visible and IR bands, values for both total and diffuse reflectance are obtained. The calibrations can be carried out at diffrerent ambient temperatures using a Tenny environmentally controlled chamber.

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