Cube-Shaped Tunable Prisms for Non-Mechanical Beam Steering
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Solution Overview
Problem
Current light control systems rely on mechanical means for beam steering, which are heavy, costly, and occupy significant space, with no known non-mechanical, liquid-based solutions for two-dimensional beam steering.
Innovation Solution
A light control system utilizing an array of cube-shaped tunable prisms, each powered by four variable voltages, which adjust their deflection angle in two dimensions to steer the light beam optically, eliminating the need for mechanical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical means (motor driven actuation) are used for beam steering, then reliability is improved, but weight increases and device complexity increases
Solution Approach 1:
The patent replaces mechanical motor-driven actuation systems with an electrowetting-based liquid crystal system. The liquid crystal composition changes its refractive index in response to electrical signals, enabling beam steering without any moving mechanical parts. This substitution eliminates motors, gears, and other mechanical components that contribute to weight and complexity while maintaining steering functionality.
Solution Approach 2:
The patent employs a liquid-based electrowetting mechanism to achieve beam steering. By applying electrical voltage to the liquid crystal composition, the system creates optical path changes similar to how pneumatic or hydraulic systems use fluid pressure changes to achieve mechanical movement. This liquid-based approach replaces solid mechanical actuation with a more compact electrical-field-controlled system.
2Reliability
If mechanical means (motor driven actuation) are used for beam steering, then reliability is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical motor-driven actuation systems with an electrowetting-based liquid crystal system. The liquid crystal composition changes its refractive index in response to electrical signals, enabling beam steering without any moving mechanical parts. This substitution eliminates motors, gears, and other mechanical components that contribute to weight and complexity while maintaining steering functionality.
Solution Approach 2:
The patent controls beam steering by changing the electrical voltage parameter applied to the liquid crystal composition. By varying the voltage, the system dynamically adjusts the refractive index of the liquid crystal, which in turn changes the beam deflection angle. This parameter-based control replaces complex mechanical positioning systems with simple electrical control.
3Reliability
If mechanical means are used for beam steering, then robustness is improved, but space volume increases
Solution Approach 1:
The patent replaces mechanical motor-driven actuation systems with an electrowetting-based liquid crystal system. The liquid crystal composition changes its refractive index in response to electrical signals, enabling beam steering without any moving mechanical parts. This substitution eliminates motors, gears, and other mechanical components that contribute to weight and complexity while maintaining steering functionality.
Solution Approach 2:
The patent uses a two-dimensional array of cube-shaped tunable prisms to achieve beam steering in both horizontal and vertical dimensions simultaneously. This spatial arrangement of multiple small-volume prism elements provides two-dimensional control without requiring large mechanical scanning ranges, effectively using dimensional organization to reduce overall system volume.
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
The system achieves non-mechanical, two-dimensional beam steering, reducing size, weight, and cost while maintaining reliability, making it suitable for various applications like searchlights and headlamps.
Implementation Method 1
Each tunable prism comprises a liquid that varies the tunable deflection angle in the two dimensions in response to the four variable voltages supplied thereto
Implementation Method 2
Each tunable prism has a tunable deflection angle that is variable in two dimensions and is configured to optically steer the light beam emitted from the light source in the two dimensions based on the tunable deflection angle
Data Source
AI summary
A light control system includes a housing, a controllable power source, a light source, and a plurality of cube-shaped tunable prisms. The controllable power source supplies at least four variable voltages. The light source is operable to emit a light beam. The cube-shaped tunable prisms are arranged in a manner so there are no gaps between adjacent tunable prisms. Each tunable prism receives a portion of the emitted light beam, each has a tunable deflection angle that is variable in two dimensions, and each is configured to optically steer the emitted light beam in the two dimensions based on the tunable deflection angle. Each tunable prism is further coupled to receive the four variable voltages. Each tunable prism comprises a liquid that varies the tunable deflection angle in two dimensions in response to the four variable voltages supplied thereto, to thereby deflect the light beam.