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In the present paper, we discuss the design of a projection system withcurved display and its enhancement by variably adjusting the curvature. Wedemonstrate that the focal surface curvature varies significantly with a changeof the object position and that it can easily be computed with the Seidelaberration theory. Using this analytically derived curvature value as thestarting point, we optimise a refocusable projection system with 90 degreesfield of view and F/#=6.2 . It is demonstrated that such a system can providestable image quality and illumination when refocusing from infinity to 1.5 m.The gain in spatial resolution is as high as 1.54 times with respect to a flatfocal surface. Furthermore, we prove that a silicon die can be curved to therequired shape with a safety factor of 4.3 in terms of the mechanical stress.Finally, it is shown that the developed system can be used in a virtual realityheadset providing high resolution, low distortion and a flexible focusing mode.

Variable Curvature Displays: Optical Designs and Applications for VR/AR/MR Headsets