Method of forming quantum dots for lenses of technical vision cameras in the infrared and ultraviolet ranges

  • Mortin Konstantin orcid

    Digital Steel JSC, Moscow 123100, Russia
Article ID: 3791
DOI: https://doi.org/10.59400/mtr3791
Keywords: quantum dots, formation technique, lenses, technical vision cameras, IR-band, UV-band, nanoparticle integration, industrial diagnostics

Abstract

This paper presents a comprehensive methodology for the formation of quantum dots (QDs) with tailored optical properties, designed for integration into machine vision camera lenses operating in the ultraviolet radiation (UV) and infrared radiation (IR) spectral ranges. Based on a self-consistent solution of the Schrödinger–Poisson equations and the non-equilibrium Green’s function (NEGF) formalism, a predictive model was developed to determine QD energy levels and spectral characteristics with an error below 1%. Experimentally synthesized CdSe QDs with a radius of 4.0 nm exhibited an emission energy of 1.864 eV (λ ≈ 665.2 nm) and a photoluminescence quantum yield of 98.8%. QD integration into a PDMS polymer matrix via spin-coating, followed by dual-layer encapsulation (ALD Al₂O₃ 20 nm and Parylene C 2 μm), ensured optical transparency >95% in the visible range and a controlled refractive index shift of Δn ≈ 0.009 at a 1.0% volume fraction. A surface coverage density of ~1.80 × 1012 QDs/cm2 was achieved, with an inter-dot spacing of 23.6 nm and size control accuracy of ±0.3 nm. Accelerated aging tests confirmed high operational stability: after 100 thermal cycles (−40/+85 °C), the quantum yield decreased by only 4.2%, and after 1,000 h at 85 °C/85% RH, by 7.8%. The proposed methodology is fully compatible with industrial micro- and nanofabrication processes, enabling scalable production of energy-efficient multispectral machine vision cameras with enhanced spectral selectivity, sensitivity, and reliability for industrial inspection, robotics, and scientific applications.

Published
2026-05-22
How to Cite
Konstantin, M. (2026). Method of forming quantum dots for lenses of technical vision cameras in the infrared and ultraviolet ranges. Materials Technology Reports, 4(1). https://doi.org/10.59400/mtr3791
Issue
Vol. 4 No. 1 (2026)
Section
Article

Copyright (c) 2026 Mortin Konstantin

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

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