A scanning beam display controls the curvature of scanning light wave impinging on the eye to simulate image points of differing depth. To simulate an object at a far distance the generated light waves are flatter. To simulate closer objects, the light wave curvature increases. When changing the curvature...http://www.google.se/patents/US6388641?utm_source=gb-gplus-sharePatent US6388641 - Scanned beam display with adjustable accommodation
