Pyroelectric vidicons and newly developped Pyroelectric arrays give a NETD around 0.5 K for 25 Hz chopping frequency. However while Pyroelectric vidicons operate with 200 TV lines, pyroelectric arrays are limited to 64 elements in the present state of the art. This number of elements will probably increase dramatically in the next few years, and new solutions are proposed.
Armand Hadni, Armand Hadni,
"New Possibilities Of Infrared Imaging With Pyroelectric Detectors Arrays", Proc. SPIE 0666, Far-Infrared Science and Technology, (26 September 1986); doi: 10.1117/12.938824; https://doi.org/10.1117/12.938824