| 摘要 |
A source of thermal radiation for calibrating or testing infrared thermometers or detectors, in which improved temperature uniformity of the radiation-emitting surface is achieved by supplying heat to that surface by condensation of a working fluid as in a heat pipe. With appropriate selection of the working fluid, a wide range of temperatures is possible. Air convection currents at the radiation-emitting opening of the device may be suppressed by creation of a transition region of heated air by a baffle and air heater, further improving the temperature uniformity of the radiation-emitting surface.
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