A High Sensitive Transient Optic Pyrometer

A new pyrometer has been developed, which uses: (a) dichroic splitters as pyrometer beamsplitters which increases the splitter efficient from about 25% (for a half-transmit half-reflect beamsplitter) to about 85%; (b) 50 dB amplifiers with an input electrical resistance less than 100 and response time less than 5 ns improve the response of the original version of the pyrometer, and (c) a tungsten standard lamp as the pre-experimental calibration standard light irradiance source which makes the pre-shot calibration more convenient and reliable. As an example to test its ability, temperature measurements for single crystal sodium chloride shocked to pressures from 36 to 60 GPa were conducted, temperatures of 1 500K to 3 600 K were calculated from the recorded light radiance signals.