Deformable Mirror Isolated Glue Joints Surface Quality
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Solution Overview
Problem
Existing deformable mirrors face challenges in maintaining surface quality, precision, and spatial resolution due to the assembly of actuators, which can cause surface irregularities and reduce the mirror's performance, particularly in high-precision applications.
Innovation Solution
A deformable mirror design featuring a thin, flexible membrane with actuators connected via isolated glue joints, allowing for precise control and minimizing the quantity of glue used, which reduces the impact on the membrane's surface and enhances the mirror's stability and reactivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the membrane thickness is increased to maintain surface quality and reduce assembly impact, then the surface condition and rigidity are improved, but the membrane's deformation capability and spatial resolution are reduced
Solution Approach 1:
The patent applies local quality by using isolated glue joints only at specific actuator attachment points rather than coating the entire membrane surface. This localized approach provides sufficient bonding strength for actuator attachment while preserving the membrane's flexibility and deformation capability in the majority of the surface area, thus resolving the contradiction between surface quality maintenance and deformation capability.
Solution Approach 2:
The patent segments the bonding approach by using discrete isolated glue joints instead of a continuous glue layer. This segmentation allows the membrane to maintain its flexibility and deformation properties while providing sufficient attachment points for actuators, thereby improving both surface condition preservation and deformation capability simultaneously.
2Reliability
If a continuous glue layer is applied to the entire membrane surface to secure actuators, then the actuator attachment is improved, but the membrane mass increases and resonance frequency decreases
Solution Approach 1:
The patent extracts the unnecessary portion of the glue layer by using isolated glue joints only where actuators are attached, rather than applying glue across the entire membrane surface. This extraction maintains sufficient actuator attachment reliability while significantly reducing the total glue mass, thereby preserving the membrane's resonance frequency and dynamic response speed.
3Reliability
If a continuous glue layer is applied to the entire membrane surface, then actuator attachment is improved, but thermal instability and drift phenomena increase
Solution Approach 1:
The patent segments the glue application into isolated joints rather than a continuous layer, which disrupts the formation of large-scale thermal expansion stress patterns. This segmentation approach maintains adequate actuator attachment while reducing thermal instability and drift phenomena associated with continuous glue layers, thereby improving thermal stability.
4Manufacturing precision
If a thick membrane is used to maintain surface quality, then the surface condition is improved, but the spatial resolution for controlling deformation at different points is reduced
Solution Approach 1:
The patent applies local quality by using isolated glue joints that minimally interfere with the membrane's local deformation characteristics. This approach allows the membrane to maintain its surface quality while preserving the spatial resolution needed for precise control of deformation at different points, as the isolated joints do not create the rigidity transmission issues associated with thick membranes or continuous glue layers.
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 improves the mirror's surface condition, precision, and spatial resolution, enabling fine and reproducible deformation control while maintaining the membrane's flexibility and reducing assembly-induced imperfections.
Implementation Method 1
fixed to the membrane by an adhesive joint
Data Source
Figure 1~4
Figure 5A~6
AI summary
The invention relates to a deformable mirror comprising a deformable membrane (2) having a reflecting face (3) and being mounted on a support provided with at least one actuator designed to deform said membrane (2), said actuator comprising at least one movable member (7) fixed to the membrane (2) via an adhesive joint (8) and having a main body (11) located away from the adhesive joint (8), said body being extended by an active part (12) that penetrates said adhesive joint (8) partly or completely in such a way that the adhesive spreads over the concealed face (4), parallel to the reflecting face (3), and adheres at least partly to the side wall (14) of said active part (12), this part (12) forming a tip (32) limiting the bonding footprint on said reflecting face (3). Deformable mirror for adaptive optics.