AI-Assisted GRIN Lens Molding Process
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Solution Overview
Problem
Current methods for manufacturing gradient index (GRIN) lenses lack the precision and flexibility to achieve higher optical performance, particularly in achieving micron-level control over the surface and internal structure of molded plastic parts, and require frequent tool changes for improved optical designs.
Innovation Solution
A method involving the formation of a GRIN lens through a molding process that includes providing an optical design, forming a GRIN material into an annealed puck, shaping the puck into a predetermined charge design, and optimizing the preform to produce a GRIN lens with near-spherical iso-index contours, utilizing a combination of artificial intelligence, machine learning, and optimization techniques to achieve precise control over the lens's shape and structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional injection molding or coining/press-based shaping methods are used to form GRIN lenses, then the manufacturing process is simple and tooling is easy to change, but the machining precision cannot achieve micron-level control over surface and internal structure
Solution Approach 1:
The patent applies preliminary action by creating a precisely controlled charge design before the molding process. The charge design includes predetermined layer configurations, material distributions, and geometric parameters that are prepared in advance to achieve the desired micron-level precision in the final GRIN lens. This pre-planning of the charge structure enables high precision without requiring complex real-time control during molding.
Solution Approach 2:
The patent utilizes parameter changes by systematically varying charge design parameters such as layer thickness, material composition, density distribution, and geometric dimensions to achieve the desired optical performance and micron-level precision. By controlling these parameters in the charge design stage, the method achieves high manufacturing precision while maintaining relative simplicity in the molding process.
2Adaptability or versatility
If existing GRIN manufacturing methods are used, then tooling can be changed for different designs, but frequent tooling changes are required to improve optical designs which increases cost and time
Solution Approach 1:
The patent applies segmentation by separating the design flexibility into the charge design parameters rather than requiring physical tooling changes. Different optical designs are achieved by modifying the charge configuration (layer structures, material distributions, geometric parameters) while using the same molding tooling. This segmentation of design variables from physical tooling enables adaptability without time loss from tooling changes.
Solution Approach 2:
The patent implements universality by designing a single molding tooling system that can produce multiple GRIN lens designs through variations in charge design. The universal tooling approach allows different charge configurations to be molded using the same equipment, making the manufacturing system versatile for different optical designs without requiring dedicated tooling for each design.
3Reliability
If stacking layers of optical materials is used to form GRIN lenses, then the process is straightforward, but the precision and optical performance are insufficient for modern applications
Solution Approach 1:
The patent replaces the simple mechanical stacking approach with a more sophisticated charge design and molding system. Instead of merely stacking layers mechanically, the method uses controlled material distribution, density variation, and precise geometric shaping during the molding process. This substitution of the mechanical stacking system with a controlled molding process achieves superior optical performance and reliability.
Solution Approach 2:
The patent employs composite materials by combining multiple optical materials with different refractive indices, densities, and optical properties in a single molded GRIN lens. The charge design incorporates layered and mixed material configurations that create the desired gradient index profile and optical characteristics, achieving high reliability and performance through material composition rather than simple mechanical stacking.
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 enables the production of GRIN lenses with high precision and flexibility, reducing tooling costs and allowing for various lens designs without frequent tool changes, achieving micron-level resolution and improved optical performance suitable for applications like riflescopes, binoculars, and cameras.
Implementation Method 1
forming the GRIN material into an annealed puck
Data Source
AI summary
The systems, devices, and methods described herein relate to gradient-index (GRIN) lenses formed by shaping a stack of optical materials into an annealed puck, shaping the annealed puck into a predetermined charge design, forming the charge design into an optical preform, and forming the GRIN lens from the optical preform. The steps of this process may be refined iteratively to produce a GRIN lens with a high degree of precision.