Consumer grade thermal cameras keep coming. After FLIR One with microbolometric imager, Seek Thermal came with Raytheon microbolometric sensor, and now Hema Imaging is closing a successful Kickstarter campaign.
Hema Vision camera utilizes 82x62 Heimann Sensor GmbH thermal sensor based on the new "thermal diode array technology." Hema Imaging writes: "Heimann Sensor GmbH is a developer and manufacturer of thermopile arrays for thermal sensing and other infrared sensors, and leads the world in thermopile array technology and now are the experts in thermal diode array technology."
It should be fairly cheap to fit the consumer camera bill, so exotic materials like CMT are probably not an option. So, I wonder how do these "thermal diodes" work?