Testing Temperature Uniformity Across a Glass Heater Surface

https://thin-film-heating.quillnesty.com/posts/how-to-reduce-hot-and-cold-spots-in-a-mica-heating-plate

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