Testing Temperature Uniformity Across a Glass Heater Surface

https://modern-heating-elements.fotosdefrases.com/how-to-choose-a-silicone-heater-for-industrial-equipment

In camera windows, a glass heater must deliver heat in a controlled way. It uses a glass panel combined with a conductive heating layer or heater element. One useful trait is anti-fog capability. Still, thermal stress can change the result