A Practical OEM Checklist for Specifying an ITO Glass Heater
https://smart-heater-journal.quillnesty.com/posts/how-to-choose-an-ito-glass-heater-for-optical-applications
In camera windows, an ITO glass heater must deliver heat in a controlled way. It uses a transparent conductive ITO layer applied to glass. One useful trait is full-surface heating. Still, edge losses can change the result