The company says: "The curvature of the image sensor can be designed as a one-dimensional cylindrical curvature or as a two-dimensional spherical curvature (convex or concave). As part of a customized project, scientific front illuminated 4k x 4k (16 Mpixels) - image sensors with convex and concave surfaces have already been realized. The applied vacuum technology (also usable on back side illuminated CCDs) has not created any measurable increase in detector noise or the number of cosmetic defects compared to the conventional flat image sensor with identical electro-optical properties. Cyclic mechanical stress testing has shown good results as well."
