ted by the focusing mirrors %% and yy throughthe small telescope at D. If the image is not correctly focused at 6844°—15 8 no Bulletin of the Bureau of Standards [Vol. t* 0, the line of intersection of the two small mirrors, the imageappears broken in half, as shown by (fi). Correct focus is… … Fig. 6.—Fery thermoelectric mirror type radiation pyrometer. quite evident from a consideration of (d).7 Suppose that the py-rometer were incorrectly focused upon a line source, the imagefalling at position AB instead of at 0. The image of the linereflected from the mirror yyf lies at AB and that…
Thermometry, pyrometry and calorimetry · Heat flow, thermal and thermodynamic processes
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