Lightweight Mirror Core Structure for Optical Stability
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Solution Overview
Problem
Existing mirror technologies for laser beam steering are heavy, which increases launch costs for satellites and limits dynamic performance due to inertial forces, while current lightweight solutions compromise optical performance and stability or are costly and difficult to fabricate.
Innovation Solution
A mirror device with a core structure comprising multiple stacked plates, each with varying hole sizes and densities, where smaller holes are closer to the reflective surface to maintain stability and reduce weight, using bonding techniques like hydroxide catalysis and laser welding to ensure structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the mirror thickness is increased to ensure stability of the optical form, then the stability is improved, but the weight increases in proportion to the radius cubed
Solution Approach 1:
The mirror is divided into a reflective surface layer and a lightweight core structure. The core is segmented into a pattern of ridges and valleys (or struts and voids) that provide structural support while removing unnecessary material. This segmentation allows the mirror to maintain optical stability through the reflective surface and strategic support structures while dramatically reducing overall weight.
Solution Approach 2:
The mirror structure is designed with non-uniform thickness and material distribution. The reflective surface maintains full thickness for optical stability, while the core transitions to a lightweight lattice or honeycomb structure in non-critical areas. This local variation in quality provides stability where needed while reducing weight in less critical regions.
2Ease of operation
If the mirror weight is reduced for easier transport and lower launch costs, then the ease of operation is improved, but the stability and optical performance may be compromised
Solution Approach 1:
The mirror employs a composite structure combining a highly reflective surface layer with a lightweight core material. The core may use materials such as honeycomb aluminum, foam structures, or lattice configurations that provide high strength-to-weight ratios. This composite approach ensures the reflective surface maintains optical precision while the core provides minimal weight with sufficient structural support.
3Weight of moving object
If existing lightweight core techniques like honeycomb or lattice structures are used, then the weight is reduced, but the manufacturing complexity and cost increase
Solution Approach 1:
Instead of adding complex lightweighting features to a solid mirror, the invention extracts material from the core while preserving the essential reflective surface. The lightweight core structure is created by removing material in systematic patterns (honeycomb, lattice, or strut configurations) rather than adding complex components, simplifying the manufacturing approach while achieving weight reduction.
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 achieves a lightweight mirror with maintained optical performance and stability, reducing mass and manufacturing costs, enhancing dynamic performance and ease of handling.
Implementation Method 1
using bonding techniques like hydroxide catalysis and laser welding to ensure structural integrity
Implementation Method 2
using bonding techniques like hydroxide catalysis and laser welding to ensure structural integrity
Data Source
AI summary
The present disclosure provides a mirror device comprising a reflector plate having a rear face and a reflective front face, and a core attached to the rear surface of the reflector plate. The core comprises a first plate and a second plate, the first plate being stacked on the second plate, wherein the first plate and second plate are each monolithic and comprise a glass or ceramic. The mirror device further comprises a plurality of first holes formed in the first plate, each first hole formed through the entire thickness of the first plate, and a plurality of second holes formed in the second plate, each second hole formed through the entire thickness of the second plate, where a mean width of the first holes is less than a mean width of the second holes.