Dual Deformable Mirror Adaptive Optical Apparatus
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Solution Overview
Problem
Existing adaptive optical systems face challenges in effectively compensating for high-order optical wavefront distortions caused by atmospheric fluctuations, particularly in strong turbulence conditions, where conventional methods struggle to maintain high control speed and accuracy.
Innovation Solution
The adaptive optical apparatus employs a dual-mirror configuration with split optical paths and stochastic parallel gradient descent optimization, where two deformable mirrors with different stroke widths and response speeds work in tandem to update their surface shapes based on detected light intensity, enabling efficient compensation of wavefront errors across various orders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single deformable mirror is used for wavefront compensation, then the device complexity is low, but the manufacturing precision and control accuracy for high-order distortions deteriorates
Solution Approach 1:
The patent divides the wavefront compensation function into multiple deformable mirrors (first and second deformable mirrors), where each mirror handles different aspects of wavefront distortion. This segmentation allows each mirror to be optimized for specific correction tasks, improving overall compensation accuracy while distributing the complexity across multiple components
2Adaptability or versatility
If a deformable mirror with large stroke width is used, then the compensation range for wavefront distortions is improved, but the response speed deteriorates
Solution Approach 1:
The patent segments the compensation function across multiple deformable mirrors with different characteristics. One mirror is optimized for large stroke width to handle strong turbulence conditions, while another mirror is optimized for fast response speed to track rapid wavefront changes. This segmentation allows the system to achieve both wide compensation range and high response speed simultaneously
Solution Approach 2:
The system dynamically switches between different deformable mirrors based on the turbulence conditions and the specific wavefront distortions detected. This dynamic allocation of compensation tasks allows the system to optimize performance for different operating conditions, achieving both large compensation range and fast response speed as needed
3Productivity
If conventional wavefront compensation methods are used, then the device complexity is low, but the productivity and control speed under strong turbulence deteriorates
Solution Approach 1:
The patent segments the optical path into multiple paths (first optical path and second optical path), with each path containing specific deformable mirrors and detection units. This segmentation enables parallel processing of wavefront compensation tasks, significantly improving control speed under strong turbulence conditions while organizing the complexity into manageable modular units
Solution Approach 2:
The patent introduces an optical path splitting unit as an intermediary component that divides the incoming light into multiple optical paths. This intermediary enables simultaneous processing of different wavefront components through multiple deformable mirrors, enhancing control speed while systematically managing the overall system complexity
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 accurate and high-speed compensation of both low-order and high-order wavefront distortions, improving control speed and maintaining concentration even under strong atmospheric fluctuations, thereby enhancing the system's ability to follow rapid changes in the optical wavefront.
Implementation Method 1
The optical wavefront curvature corrector is a unit for correcting a wavefront curvature of an optical signal, and displaces a mirror surface of an adaptive optical mirror (deformable mirror) for each minute section based on the correspondence relation between intensity of the optical signal and the wavefront curvature
Implementation Method 2
an optical path splitting unit that splits the light from the second deformable mirror into a first optical path and a second optical path
Implementation Method 3
a first detector that detects light intensity of the light from the first deformable mirror and the first sub-deformable mirror, a second detector that detects light intensity of the light from the second deformable mirror and the second sub-deformable mirror
Data Source
AI summary
An adaptive optical apparatus includes a first deformable mirror that includes a reflecting surface reflecting light having propagated through an atmosphere, and a drive having a plurality of drive elements and changing an uneven shape of the reflecting surface. There is also a second deformable mirror that includes a reflecting surface reflecting the light from the first deformable mirror and a drive unit having a plurality of drive elements and changing an uneven shape of the reflecting surface. There is also an optical path splitting unit that splits the light from the second deformable mirror into a first optical path and a second optical path, a first sub-deformable mirror in the first optical path that includes a reflecting surface and a drive unit that correspond to the reflecting surface and the drive unit of the first deformable mirror, and a second sub-deformable mirror.