For Xtherm T3s (almost identical to HT-301), here is the link to the SDK
LINK REMOVED FOR PRIVACY CONSIDERATION (pm me to request it, tks)
(I may remove or disable the link anytime if I'm notified of a copyright infringement)
You can pass frames grabbed with UVC protocol to the binary library (XthermDll.dll or libthermometry.so) to get radiometric temperature data.
Unfortunately, documentation is Chinese only and the demo programs are crappy, but I can help you with Chinese if there is something too difficult for Google Translate.
I also reverse engineered the binary XthermDll.dll to make it work with x64 programs and wrote some utilities for grabbing frames with OpenCV, doing NUC, naive removal of the vertical and horizonal line pattern. See XthermToolkit.zip in the link.
Enjoy the great camera on any platform you prefer
EDIT: I will
NOT send the files to Zero Posters in the forum, unless they can show a proof of purchase.