| 单词 | heat image | 
| 释义 | > as lemmasheat image  b.  A concentration of infrared or heat radiation at a particular point or portion of space, formed through the reflection or refraction of its constituent rays by a lens, reflective surface, etc. Also  heat image. rare. ΚΠ 1800    W. Herschel in  Philos. Trans. 		(Royal Soc.)	 90 313  				We can only ascribe it to a condensation of it [sc. heat] by the refraction of the lens; and, in this case, the thermometer No. 3, by its situation, must have been partly within the reach of the heat-image formed in the focus. 1840    Philos. Trans. 		(Royal Soc.)	 130 52  				The insulation of the terminal thermic image can hardly be considered in any other light than as a result of absorbent action. 1873    J. Tyndall Six Lect. on Light v. 181  				The substantial identity of light and heat..[is proved by] the formation of invisible heat-images. 1995    Guardian 9 May (Educ. section) 11/2  				The heat image is focused through a germanium window on to a pyroelectric target placed directly behind it at the end of the vidicon tube. < as lemmas | 
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