A Device for the Measurement of Transient Surface Temperature Changes

摘要

A device has been invented to allow measurement of transient surface temperature changes with fast time resolution and high temperature sensitivity while absorbing negligible heat energy from the object whose temperature is measured. The device will measure temperature changes of surfaces as small as a few square millimeters, with temperature changes comparable to one millidegree, with risetimes comparable to one millisecond, with extraction of power from the target comparable to ten nanowatts, and with accuracies better than 10 percent. The device does not cause local heating or cooling of the target, so it is not necessary that the target be stationary. (Author)