ll receiver.This may be accomplished by locating the receiver at the focalpoint of a convex lens or concave mirror or at the apex of a hollowreflecting cone. A fundamental condition, which should be satisfied by a radia-tion pyrometer, is invariability of the pyrometer reading when thedistance from… … Fig. i.—Cone type of fiocedfocus radiation pyrometer The cone receiver is made independent of distance to the source,A, by locating at a short distance in front of the cone a small dia-phragm opening, B, which acts as a secondary source, as shown inFig. i. The amount of radiation falling on any…
Thermometry, pyrometry and calorimetry · Heat flow, thermal and thermodynamic processes
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