Inkjet Printed Nanocomposite Optical Element Manufacturing
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Solution Overview
Problem
Traditional optics manufacturing techniques are limited to planar, convex, and concave surfaces on circularly symmetric optics, failing to efficiently produce complex 3D freeform gradient refractive index optics and other dielectric structures.
Innovation Solution
Inkjet printing of nanocomposite-inks with nanoparticle fillers, followed by partial curing and transfer to a die mold, allowing for the formation of 3D variable refractive-index optical elements with precise surface figures through compression and molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional grinding and polishing techniques are used, then planar, convex, and concave surfaces on circularly symmetric optics can be manufactured, but complex 3D freeform gradient refractive index optics and other dielectric structures cannot be efficiently produced
Solution Approach 1:
The patent replaces traditional mechanical grinding and polishing systems with an inkjet printing system that deposits nanocomposite materials. This substitution enables the creation of complex 3D freeform gradient refractive index optics by directly writing the refractive index profile through controlled deposition of nanoparticle-filled resin, eliminating the need for complex mechanical polishing equipment and multi-step mechanical processing.
Solution Approach 2:
The patent utilizes changes in the refractive index parameter through varying nanoparticle concentration within the nanocomposite material. By controlling the spatial distribution of nanoparticle filler (0.1-10 wt%) within the resin matrix during inkjet deposition, the refractive index can be gradient-modulated throughout the 3D structure, enabling freeform gradient refractive index optics that cannot be achieved with uniform materials through traditional mechanical methods.
2Productivity
If glass blanks are created by grinding, molding, or machining, then the desired shape can be obtained, but the process is time-consuming and limited to specific surface geometries
Solution Approach 1:
The patent performs preliminary action by depositing the nanocomposite material in a controlled manner during the inkjet printing process itself, rather than requiring subsequent mechanical processing steps. The nanocomposite ink is deposited layer-by-layer with precise control over thickness and composition, and the refractive index profile is established during deposition rather than requiring post-processing to achieve the desired surface figure and internal gradient structure.
Solution Approach 2:
The patent substitutes mechanical grinding and polishing operations with a non-mechanical inkjet deposition process. This replacement eliminates the time-consuming mechanical material removal steps while directly forming the desired geometry through controlled material deposition, thereby increasing productivity without compromising surface figure accuracy.
3Manufacturing precision
If multiple polishing stages are used with reduced particle size, then the desired surface finish is obtained, but the process becomes increasingly complex and time-consuming
Solution Approach 1:
The patent replaces the entire mechanical polishing sequence with an inkjet deposition process that directly forms the surface finish during material deposition. By controlling the deposition parameters (droplet size, deposition rate, layer thickness), the desired surface finish is achieved in a single non-mechanical process step, eliminating the need for multiple polishing stages with progressively finer abrasives and significantly reducing process time.
Solution Approach 2:
The patent changes the fundamental parameter of surface finish control from mechanical abrasion to controlled material deposition. By adjusting the nanocomposite ink formulation (nanoparticle size, concentration, distribution) and deposition parameters, the surface finish quality is controlled through material properties rather than mechanical action, achieving high precision surface finishes without the time-consuming iterative polishing process.
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
Enables the creation of complex 3D optical elements with controlled refractive gradients and surface figures, overcoming the limitations of traditional methods by producing optical elements with improved optical properties and surface accuracy.
Implementation Method 1
at least partially curing a portion of the nanocomposite-ink to form a nanocomposite slab that is at least semi-solid
Implementation Method 2
actuating the press to compress the nanocomposite slab imparting the die mold's first surface figure onto the nanocomposite slab
Data Source
AI summary
A method of manufacturing a 3-dimensional variable refractive-index optical-element with surface figure, the method comprising: depositing a plurality of nanocomposite-inks comprising an organic-matrix with a nanoparticle filler dispersed within, and at least partially curing a portion of the nanocomposite-ink to form a nanocomposite slab that is at least semi-solid; transferring the nanocomposite slab to a press, the press having a die mold with at least a first surface figure; and actuating the press to compress the nanocomposite slab and impart the die mold's first surface figure onto the nanocomposite slab to form a nanocomposite optical-element.