Pixel Array Beam Steering for Optical Communications
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Solution Overview
Problem
Directional free-space optical communications face challenges in speed limitations and sensitivity to shocks and vibrations due to the need for macroscopic elements like lenses and mirrors for beam steering, which also add bulk and inefficiency.
Innovation Solution
The method involves selecting and iteratively reducing the number of pixels from an array for directional light emission using an image projecting device, with feedback from the receiver to determine the target area, allowing for precise and efficient beam steering without bulky components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If macroscopic elements like lenses and mirrors are used for beam steering, then directional optical communication can be achieved, but speed limitations and sensitivity to shocks and vibrations occur
Solution Approach 1:
The patent replaces the mechanical beam steering system (lenses and mirrors) with an electronic control system that selectively activates pixels in an array. Instead of physically moving optical components, the system electronically directs light by controlling which pixels emit light, thereby achieving beam steering without mechanical movement. This eliminates speed limitations and sensitivity to shocks and vibrations associated with mechanical systems.
2Reliability
If macroscopic elements like lenses and mirrors are used for beam steering, then directional optical communication can be achieved, but bulky elements are added to the device
Solution Approach 1:
The patent replaces bulky mechanical optical steering components with a compact pixel array and electronic control system. The pixel array can be integrated directly into the device housing or circuit board, eliminating the need for large lenses and mirrors. This electronic approach allows for a much more compact device design while maintaining directional communication capability.
3Area of stationary object
If multiple pixels are used for light emission, then coverage area is increased, but light loss and inefficiency increase
Solution Approach 1:
The patent divides the light emission function into multiple independently controllable pixels arranged in an array. Instead of using a single large light source or all pixels simultaneously, the system selectively activates only the specific pixels needed to cover the target area. This segmentation allows for precise control of light emission, reducing energy waste from activating unnecessary pixels while still achieving adequate coverage.
Solution Approach 2:
The patent employs partial action by activating only the necessary subset of pixels required to cover the target area rather than all pixels. The system determines the minimum number of pixels needed based on target position and size, activating only those specific pixels. This partial activation reduces light loss and improves efficiency while maintaining sufficient coverage for communication.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables high-speed, compact, and robust directional optical communications, suitable for applications like quantum key distribution and ultra-high-bandwidth data transfer, while minimizing light loss and compensating for inefficiencies with faster communication speeds.
Implementation Method 1
selecting at least one pixel from an array of pixels provided by an image projecting device for emitting light towards a target area of a receiving device, and emitting light by the selected at least one pixel towards the target area
Data Source
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AI summary
Directional optical communications are provided between devices such as at least one pixel is selected from an array of pixels provided by an image projecting device for emitting light from an emitting device towards a target area of a receiving device. Light is then emitted by the selected at least one pixel towards the target area.