Deformable Mirror Microchannel Support Pneumatic Actuation
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Solution Overview
Problem
Current deformable mirror systems are bulky, have a low number of actuation elements, and exhibit slow response times, limiting their ability to correct high spatial frequency aberrations and temporal frequencies effectively.
Innovation Solution
A lightweight deformable mirror is created using additive manufacturing to build a support structure on a thin film mirror with an elastomeric support structure containing microchannels, which are individually addressable with a fluid pressure source, allowing for high-speed and precise deformation of the mirror surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If electromagnetic push-pull actuators are used at selected points on the mirror, then the mirror can be distorted into a desired shape, but the system becomes bulky and has slow response times
Solution Approach 1:
The patent uses pneumatic actuators that apply pressure through flexible membranes to deform the mirror surface. This pneumatic approach replaces the electromagnetic push-pull actuators, enabling faster response times while maintaining the ability to distort the mirror into desired shapes for correcting optical aberrations.
Solution Approach 2:
The patent employs flexible membranes as intermediaries between the pneumatic actuators and the mirror surface. These thin flexible films allow for rapid transmission of pressure changes across the mirror surface, significantly improving the response time compared to rigid electromagnetic actuators while maintaining precise shape control.
2Shape
If electromagnetic push-pull actuators are used at selected points on the mirror, then the mirror can be distorted into a desired shape, but the system becomes bulky
Solution Approach 1:
The pneumatic actuation system uses pressure distribution through flexible membranes instead of multiple discrete electromagnetic actuators. This approach significantly reduces the physical size and complexity of the system while maintaining the capability to distort the mirror surface into various desired shapes for aberration correction.
Solution Approach 2:
The flexible membranes serve as thin, lightweight intermediaries that transmit pneumatic pressure across the mirror surface. This eliminates the need for bulky electromagnetic actuator assemblies, reducing overall system complexity and size while preserving the ability to achieve precise mirror surface deformation.
3Manufacturing precision
If current deformable mirror technology is used, then the mirror can be actuated, but there are not enough push-pull points for high spatial frequency correction
Solution Approach 1:
The pneumatic actuation system with flexible membranes enables continuous pressure distribution across the mirror surface, effectively providing infinite actuation points. This allows for high spatial frequency correction by applying localized pressure variations anywhere on the mirror surface, overcoming the limitation of discrete push-pull actuator positions.
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 solution provides improved spatial frequency correction and higher frequency dynamic response, resulting in a lightweight, high-performance deformable mirror suitable for adaptive optics applications.
Implementation Method 1
A fluid pressure source is connected to the open end of the microchannels
Implementation Method 2
An elastomeric support structure is connected to the mirror back exposed surface
Data Source
AI summary
A deformable mirror has a mirror front face and a mirror back exposed surface. An elastomeric support structure is connected to the mirror back exposed surface. The elastomeric support structure includes a multitude of microchannels wherein the microchannels have a closed end located proximate the mirror back exposed surface and an open end located away from the mirror back exposed surface. A fluid pressure source is connected to the open end of the microchannels. A power source and control system are connected to the fluid pressure source.