The BBS-200 blackbody source from Optikos Corp.
is a reference source of infrared radiation similar in geometry to the primary standard of the UK’s National Physical Laboratory. Designed to emit maximum flux at any temperature, it makes measurements in the 2- to 14-µm thermal wavebands and can be used for calibrating thermal imagers and radiometers. It is heated and cooled by a recirculating water bath connected by insulated hoses with self-sealing quick-disconnect connectors. It has a double-helix water jacket in which water circulates in the cylindrical heat exchanger from front to back and vice versa, simultaneously, to minimize thermal gradients along the cavity. A motorized shutter closes off the cavity while the blackbody is changing temperature, shortening settling time and minimizing proximity heating of the instrument being calibrated.
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