Liquid Crystal Polarization Grating Beam Steering for Image Stabilization
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Solution Overview
Problem
Image sensors experience movement during capture cycles, leading to blurred images due to non-central positioning, and existing technologies lack efficient methods for stabilizing images and improving resolution without increasing cost or complexity.
Innovation Solution
The use of Liquid Crystal Polarization Gratings (LCPGs) for beam steering, allowing for stabilization of images by adjusting the angle of incoming light and improving resolution by steering light from different points of an object or scene onto the same pixel sequentially, combined with fine beam steering adjustments using wavelength control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If image sensor movement is not compensated, then device complexity remains low, but image quality deteriorates due to blurring
Solution Approach 1:
The patent replaces mechanical image stabilization systems with a liquid crystal-based optical phase modulation system. The liquid crystal device modulates the phase of incoming light waves to compensate for sensor movement, achieving image stabilization without mechanical moving parts. This resolves the contradiction by providing reliable image quality improvement while avoiding the complexity of mechanical stabilization mechanisms.
Solution Approach 2:
The patent changes the optical phase parameter of incoming light using liquid crystal modulation. By dynamically adjusting the phase of light waves according to sensor movement characteristics, the system compensates for displacement and maintains image quality. This parameter-based approach provides effective stabilization without requiring complex mechanical or structural modifications.
2Measurement precision
If more pixels are added to improve resolution, then image resolution improves, but device cost increases
Solution Approach 1:
The patent replaces physical pixel multiplication with optical phase modulation to achieve super-resolution. The liquid crystal device manipulates light phase information to synthesize higher resolution images from lower resolution sensor data, effectively improving spatial resolution without adding more physical pixels or increasing sensor complexity.
Solution Approach 2:
The patent exploits phase parameter modulation of light to achieve resolution enhancement. By varying the optical phase according to predetermined patterns and combining multiple phase-modulated images, the system reconstructs high-resolution images from low-resolution sensors, resolving the contradiction between resolution improvement and device complexity.
3Area of stationary object
If beam steering angle is increased to expand field of view, then coverage area improves, but beam precision deteriorates
Solution Approach 1:
The patent employs dynamic liquid crystal phase modulation to adaptively control beam steering. The system can dynamically adjust phase patterns to steer beams across different angles while maintaining focus and precision at each position. This dynamic control resolves the contradiction by enabling wide field of view coverage without sacrificing beam precision through rapid phase reconfiguration.
Solution Approach 2:
The patent adds the phase dimension to traditional spatial beam control. By utilizing optical phase as an additional control dimension, the system achieves two-dimensional field of view expansion while maintaining one-dimensional beam precision through independent phase modulation. This resolves the contradiction by operating in an expanded parameter space.
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 effectively stabilizes images by ensuring light from each part of the object hits the same pixel, and enhances resolution by combining intermediate images, achieving higher spatial resolution without increasing the number of pixels or sensor cost.
Implementation Method 1
Liquid Crystal Polarization Gratings (LCPGs) provide for non-mechanical beam steering of light beams
Implementation Method 2
The use of Liquid Crystal Polarization Gratings (LCPGs) for beam steering
Implementation Method 3
Liquid Crystal Waveguides (LCWGs) are also known, and provide an alternative beam steering technology
Data Source
AI summary
The present disclosure provides numerous applications for the use of liquid crystal polarization gratings (LCPGs) to controllably steer light. When combined with an image sensor, light generated or reflected from different fields of view (FOV) can be steered, allowing an increase in the FOV or the resolution of the image. Further, the LCPG can stabilize the resulting image, counteracting any movement of the image sensor. The combination of LCPGs and liquid crystal waveguides (LCWGs) allows fine deflection control of light (from the LCWG) over a wild field of view (from the LCPG). Further applications of LCPGs include object tracking and the production of depth images using multiple imaging units and independently steered LCPGs. The LCPG may be used in controlling both the projection and reception of light.