Fresnel screen comprises optical devices each comprising basic lens and basic image, each image comprising several subsets and pixels corresponding to different height of observer relative to screen

摘要

The screen comprises several optical devices each comprising a basic lens (51) and a basic image (41), located opposite the basic lens, constituted by pixels which the observer can see through the basic lens. The observer can see one or more different pixels according to his position relative to the basic lens. Each basic image comprises several subsets (41a,41b,41c) and pixels each corresponding to a different height of the observer relative to the screen. A subset (41a) is horizontally offset relative to the subset (41b) located immediately above or below it by a distance equal to the horizontal gap between the basic images (41,42,43) located respectively immediately above or below, divided by the number of subsets contained in the basic image.