The Project Vermont Team set out to solve one of the most well-known optical issues in conventional photography: field curvature.
Field curvature exists because lenses don’t want to focus on a plane. A lens delivers sharpest focus along a curved path, rather than on a flat sensor. The result: objects appear out of focus across the image. By curving the focal surface, we eliminate the need for the lens to address field curvature and can use the resulting optical design freedom to improve other aspects of the system. Specifically, we can improve resolution, light-gathering capability, lateral chromatic aberration, distortion and illumination uniformity while also reducing system size, complexity and cost.
Highly curved image sensors: a practical approach for improved optical performance