A study on the optical parts for a semiconductor laser module

Oh, Jun-Girl; Lee, Dongkil; Kim, Yang-Gyu; Lee, Kwang-Hoon; Park, Young-Sik; Jang, Kwang-Ho; Kang, Soo Cheol

doi:10.3938/jkps.65.1536

Cited by 1 publication

(1 citation statement)

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“…With extensive research on miniaturization and precision in medical endoscopes and laser systems, as well as consumer products like mobile phones, high-precision optical glass components exhibit a wide range of application prospects [1][2][3][4]. For the manufacture of high-precision imaging optics, e.g., for endoscope systems, the avoidance of optical aberrations is elementary.…”

Section: Introductionmentioning

confidence: 99%

Studies on Protective Coatings for Molding Tools Applied in a Precision Glass Molding Process for a High Abbe Number Glass S-FPM3

et al. 2023

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Precision glass molding (PGM) is an efficient process used for manufacturing high-precision micro lenses with aspheric surfaces, which are key components in high-resolution systems, such as endoscopes. In PGM, production costs are significantly influenced by the lifetimes of elaborately manufactured molding tools. Protective coatings are applied to the molding tools to withstand severe cyclic thermochemical and thermomechanical loads in the PGM process and, in this way, extend the life of the molding tools. This research focuses on a new method which combines metallographic analysis and finite element method (FEM) simulation to study the interaction of three protective coatings—diamond-like carbon (DLC), PtIr and CrAlN—each in contact with the high Abbe number glass material S-FPM3 in a precision glass molding process. Molding tools are analyzed metallographically using light microscopy, white light interferometry, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The results show that the DLC coating improved process durability more than the PtIr and CrAlN coatings, in which the phenomenon of coating delamination and glass adhesion can be observed. To identify potential explanations for the metrological results, FEM is applied to inspect the stress state and stress distribution in the molding tools during the molding process.

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Section: Introductionmentioning

confidence: 99%