Patent ID: 9046633
Filing Date: 2015-06-02
Classification: G02B,G02C

Abstract:
1. A transparent optical element, comprising: a plurality of layers superposed along an optical axis of the element, each layer extending perpendicularly to the optical axis formed from a tiling of contiguous cells, with a distribution function of an optical phase shift in each layer having a constant value inside each cell of said layer, neighboring cells in each layer being separated by a wall that extends perpendicularly to said layer, a refractive function of the element resulting from a combination of the respective optical phase shift distribution functions of the layers, the optical phase shift being obtained by at least one of a variation in thickness or by variations in refractive index of transparent materials contained in the cells, wherein the tilings of at least two of the layers do not coincide in a projection of said layers onto a surface perpendicular to the optical axis, so that the boundaries between some of the contiguous cells of one of the two layers cut some cells of the other of the two layers in said projection, and the element is adapted to form an image of a scene from the light originating from said scene and passing through said element.