Spatial Light Modulator Phase Image Allocation for Multi-Target Optical Transmission
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Solution Overview
Problem
Existing optical transmission devices using phase modulation-type spatial light modulators struggle to establish stable communication with multiple communication targets located at different positions and directions, as they cannot radiate uniform beams effectively.
Innovation Solution
An optical transmission device with a spatial light modulator that allocates specific modulation regions to each communication target, sets a phase image for communication, and controls the light source to ensure the light is radiated to the appropriate modulation region, enabling stable spatial light signal transmission to multiple targets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a phase modulation-type spatial light modulator is operated in two operation patterns with alternating pause sections, then the transmission period is reduced and continuous communication is achieved for a single target, but stable communication cannot be established with multiple communication targets located at different positions and directions
Solution Approach 1:
The modulation part of the spatial light modulator is divided into multiple independent modulation regions, each dedicated to a specific communication target. This segmentation allows simultaneous beam formation for multiple targets without requiring time-division multiplexing, thereby maintaining continuous transmission while enabling stable communication with multiple targets at different positions and directions.
Solution Approach 2:
Each modulation region is independently controlled to produce a phase image specific to its assigned communication target. This local quality approach ensures that each region optimizes beam radiation for its specific target's position and direction, enabling uniform beam radiation to multiple targets simultaneously while maintaining communication stability.
2Device complexity
If a single modulation region is used for spatial light modulation, then the device complexity is low, but uniform beam radiation to multiple communication targets at different positions cannot be achieved
Solution Approach 1:
The modulation part is segmented into multiple modulation regions, with each region independently controllable. This allows the system to adapt to multiple communication targets at different positions and directions by activating appropriate regions, thereby enhancing versatility without requiring complex external switching mechanisms.
Solution Approach 2:
Multiple modulation regions within a single spatial light modulator enable the device to serve multiple communication targets simultaneously. Each region can be independently configured to radiate beams in different directions, providing multi-functionality while maintaining a unified device structure.
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 allows for stable and accurate transmission of spatial light signals to multiple communication targets, ensuring uniform beam radiation and continuous communication.
Implementation Method 1
a spatial light modulator having a modulation part to which light emitted from the light source is radiated, the spatial light modulator modulating a phase of the emitted light using the modulation part
Data Source
AI summary
A optical transmission device comprising a light source, a spatial light modulator which has a modulation part onto which light emitted from the light source is radiated, and which modulates the phase of the radiated light by means of the modulation part, and a control unit which allocates modulation regions associated with respective communication targets to the modulation part of the spatial light modulator, configures, in each modulation region, a phase image for forming an image used in communication with the communication target in the position of the communication target, and controls the light source such that light is radiated onto the modulation part while the phase image is configured therein.