Optical arrangement for processing an optical wave
OwnerMing Li, Anders Larssoninventors
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Abstract
An optical arrangement comprising a plurality of cells arranged in a two-dimensional array on, into, or partly into an optical medium, each said cell having a pattern structure comprising a number of grooves which are parallel to each other and which form a grating. The grating of each cells forms at least two sections which are displaced in relation to each other by a predetermined distance in a direction which is essentially perpendicular to the longitudinal direction of the grooves. The grooves of two or more adjacent cells are unaligned with one another for controlling the phase or amplitude of one or more incident optical waves when the cells receive the incident optical waves.
Claims47
An optical arrangement, comprising a plurality of cells arranged in a two dimensional array on, into, or partly into an optical medium, each said cell having a pattern structure comprising a number of grooves which are parallel to each other and which form a grating wherein said grating of each said cell forms at least two sections which are displaced in relation to each other by a predetermined distance in a direction which is essentially perpendicular to the longitudinal direction of said grooves, wherein the grooves of two or more adjacent cells are not in alignment with one another to control the phase or amplitude of one or more optical waves, when said cells receive one or more incident optical waves.
A method for processing an optical wave by means of an optical element provided with a plurality of cells arranged in a two-dimensional array, said cells being provided with a pattern structure formed therein said pattern structure in each of said cells being provided with a number of grooves which are parallel to each other and which form a grating, wherein said grating forms at least two sections which are displaced in relation to each other by a predetermined distance in a direction which is essentially perpendicular to the longitudinal direction of said grooves, whereby the positions of said grooves are displaced between the cells and/or that the duty cycle of said gratings is varied so that when said cells receive an incident optical wave, the phase and/or the amplitude of said optical wave is thereby controlled by said element.
Dependencies are inferred from the claim text.