>Pancake optics, compared to other optics designs, can provide a far superior magnified image quality in a much thinner form factor, especially for products with field of views (FOV) ranging from 50 degrees to 100 degrees.

>However, previous Pancake optics needed at least one spherical glass lens to avoid image artifacts caused by birefringence of the plastic material, but this glass lens added both weight and cost to the lens system.

> Kopin’s new all-plastic Pancake optics with all aspherical lenses (compared to previous Pancake optics using spherical glass lens) substantially reduce the weight and thickness while significantly improving the image quality – all at a lower cost.