Optical processing
DCFirst Claim
1. A method of operating an optical device comprising an SLM having a two-dimensional array of controllable phase-modulating elements, the method comprisingdelineating groups of individual phase-modulating elements;
- selecting, from stored control data, control data for each group of phase-modulating elements;
generating from the respective selected control data a respective hologram at each group of phase-modulating elements; and
varying the delineation of the groups and/or the selection of control datawhereby upon illumination of said groups by respective light beams, respective emergent light beams from the groups are controllable independently of each other.
1 Assignment
Litigations
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Accused Products
Abstract
To operate an optical device comprising an SLM with a two-dimensional array of controllable phase-modulating elements groups of individual phase-modulating elements are delineated, and control data selected from a store for each delineated group of phase-modulating elements. The selected control data are used to generate holograms at each group and one or both of the delineation of the groups and the selection of control data is/are varied. In this way upon illumination of the groups by light beams, light beams emergent from the groups are controllable independently of each other.
47 Citations
14 Claims
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1. A method of operating an optical device comprising an SLM having a two-dimensional array of controllable phase-modulating elements, the method comprising
delineating groups of individual phase-modulating elements; -
selecting, from stored control data, control data for each group of phase-modulating elements; generating from the respective selected control data a respective hologram at each group of phase-modulating elements; and varying the delineation of the groups and/or the selection of control data whereby upon illumination of said groups by respective light beams, respective emergent light beams from the groups are controllable independently of each other. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10)
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2. A method of operating an optical device according to clam 1, wherein control of said light beams is selected from the group comprising:
control of direction, control of power, focussing, aberration compensation, sampling and beam shaping.
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11. An optical device comprising an SLM and a control circuit, the SLM having a two-dimensional array of controllable phase-modulating elements and the control circuit having a store constructed and arranged to hold plural items of control data, the control circuit being constructed and arranged to delineate groups of individual phase-modulating elements, to select, from stored control data, control data for each group of phase-modulating elements, and to generate from the respective selected control data a respective hologram at each group of phase-modulating elements,
wherein the control circuit is further constructed and arranged to vary the delineation of the groups and/or the selection of control data, whereby upon illumination of said groups by respective light beams, respective emergent light beams from the groups are controllable independently of each other.
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14. An optical routing device having at least first and second SLMs and a control circuit, the first SLM being disposed to receive respective light beams from an input fibre array, and the second SLM being disposed to receive emergent light from the first SLM and to provide light to an output fibre array, the first and second SLMs each having a respective two-dimensional array of controllable phase-modulating elements and the control circuit having a store constructed and arranged to hold plural items of control data, the control circuit being constructed and arranged to delineate groups of individual phase-modulating elements, to select, from stored control data, control data for each group of phase-modulating elements, and to generate from the respective selected control data a respective hologram at each group of phase-modulating elements,
wherein the control circuit is further constructed and arranged to vary the delineation of the groups and/or the selection of control data, whereby upon illumination of said groups by respective light beams, respective emergent light beams from the groups are controllable independently of each other.
Specification