Why the Sealing Process was and is so important to the progress of eMagin's display. "Moisture Control". And the rest of the problems an eMagin display remedies...Todd South...

As the IVAS program neared test deadlines in August, Potts said developers found inconsistencies in some of the heads-up displays. Those caused a “screen door effect,” in some of the headsets, meaning the image resolution had a gridded view.

The problem was attributed to moisture getting into sensitive areas of the device, Potts said.

The other issue was one regarding field-of-view.

A 40-degree field-of-view has been the standard for most currently fielded mixed reality night vision devices, according to Potts. But the IVAS program sought to double that to an 80-degree field-of-view.

However, that effort pushed the boundaries of what waveguide technology can currently provide, Potts said. And technicians found that the wider field-of-view caused a stretching effect that slightly misaligned imagery in the mixed reality view. Potts likened the effect to pulling at a balloon and seeing the view distorted.

https://www.armytimes.com/news/your-army/2021/10/18/armys-22-billion-mixed-reality-goggles-get-a-dod-ig-audit/