Managing Heat Loss Around a Glass Heater for More Stable Operation

https://silicone-heating-insights.dovetailscope.com/posts/where-mica-heaters-are-used-in-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