Onboard Wavefront Sensing for Real-Time Aero-Optical Correction
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Solution Overview
Problem
Existing optical systems face challenges in high-speed or turbulent environments due to aero-optical effects such as image shift, wavefront distortion, and beam jitter caused by aerodynamic density gradients, which affect the performance of optical systems like lasers and sensors.
Innovation Solution
A system and method using a wavefront sensor and reflectors on laminar flow airfoils to measure, correct, and implement real-time adjustments for aero-optical effects, employing a double-pass configuration with instantaneous phase-shift interferometry to determine wavefront distortions and optical degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical systems operate in high-speed or turbulent environments, then the system can perform missions in challenging conditions, but aero-optical effects cause image shift, wavefront distortion, and beam jitter that degrade optical performance
Solution Approach 1:
The system employs a wavefront sensor to continuously measure aero-optical distortions in real-time and feeds this information back to a correction system that actively compensates for the distortions, enabling the optical system to maintain performance stability while operating in high-speed or turbulent environments
Solution Approach 2:
The system performs preliminary measurements of wavefront distortions using the wavefront sensor before the distortions affect the optical mission, allowing for proactive correction and compensation to maintain optical performance throughout the high-speed or turbulent operation
2Reliability
If real-time measurements of wavefront distortions are performed, then optical degradation can be corrected, but the system complexity increases due to additional sensors and processing requirements
Solution Approach 1:
The wavefront sensor serves multiple functions: it measures wavefront distortions caused by aero-optical effects, provides data for real-time correction, and enables the system to adapt to changing environmental conditions, thereby reducing the need for separate dedicated correction components
Solution Approach 2:
The wavefront sensor acts as an intermediary between the optical system and the correction mechanism, measuring distortions and providing the necessary information for real-time compensation without requiring direct integration of complex correction hardware
3Reliability
If wavefront sensing and real-time correction systems are implemented, then optical degradation can be compensated, but the weight and power consumption of the system increase
Solution Approach 1:
The system uses the existing optical path and components to perform wavefront sensing and correction, where the wavefront sensor utilizes the same optical elements already present in the system, thereby minimizing additional weight requirements while maintaining optical performance
4Measurement precision
If instantaneous phase-shift interferometry is used to measure wavefront distortions, then measurement precision is improved, but the difficulty of detecting and measuring increases due to complex interferometric requirements
Solution Approach 1:
The system replaces complex mechanical interferometric setups with a wavefront sensor that uses digital image processing and computational methods to achieve instantaneous phase-shift interferometry, simplifying the physical measurement apparatus while maintaining high precision
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
Enables accurate and real-time measurements of wavefront distortions and optical degradation, allowing for effective corrections and improvements in optical system performance in high-speed or turbulent scenarios.
Implementation Method 1
determining the wavefront distortions may be performed via an instantaneous phase-shift interferometry by determining a phase shift of the laser beam directly by the wavefront sensor during the air flow
Implementation Method 2
a reflector disposed on a laminar flow airfoil, wherein the reflector may be positioned along an optical axis facing the optical window and configured to receive the laser beam from the optical window and to reflect the laser beam toward the optical window
Implementation Method 3
an optical window configured for transmitting the laser beam in-and-out through the optical window
Data Source
AI summary
A system and a method for measuring, correcting, and implementing real-time adjustments for aero-optical effects for vehicle-based optical systems used in high speed or turbulent scenarios are provided. The system and method may include obtaining, via an imaging system, a wavefront measurement of air flow in a high speed or turbulent environment. The imaging system may include a wavefront sensor and optical components within a module and configured for manipulating a laser beam, and an optical window for transmitting the laser beam in-and-out through the optical window (e.g., in a beam director or “turret”). The imaging system may comprise, outside the module, a reflector or mirror positioned along an optical axis and configured to receive and reflect the laser beam from the optical window. The method may include determining wavefront distortions of the laser beam based on the wavefront measurement and determining optical degradation based on the wavefront distortions.