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Open AccessReview

A Review of the Precision Glass Molding of Chalcogenide Glass (ChG) for Infrared Optics

1
Key Laboratory of Fundamental Science for Advanced Machining, Beijing Institute of Technology, Beijing 100081, China
2
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
*
Author to whom correspondence should be addressed.
Micromachines 2018, 9(7), 337; https://doi.org/10.3390/mi9070337
Received: 10 June 2018 / Revised: 16 June 2018 / Accepted: 22 June 2018 / Published: 2 July 2018
(This article belongs to the Special Issue Glassy Materials Based Microdevices)
Chalcogenide glass (ChG) is increasingly demanded in infrared optical systems owing to its excellent infrared optical properties. ChG infrared optics including ChG aspherical and freeform optics are mainly fabricated using the single point diamond turning (SPDT) technique, which is characterized by high cost and low efficiency. This paper presents an overview of the ChG infrared optics fabrication technique through precision glass molding (PGM). It introduces the thermo-mechanical properties of ChG and models the elastic-viscoplasticity constitutive of ChG. The forming accuracy and surface defects of the formed ChG are discussed, and the countermeasures to improve the optics quality are also reviewed. Moreover, the latest advancements in ChG precision molding are detailed, including the aspherical lens molding process, the ChG freeform optics molding process, and some new improvements in PGM. View Full-Text
Keywords: chalcogenide glass; infrared optics; precision glass molding; aspherical lens; freeform optics chalcogenide glass; infrared optics; precision glass molding; aspherical lens; freeform optics
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MDPI and ACS Style

Zhou, T.; Zhu, Z.; Liu, X.; Liang, Z.; Wang, X. A Review of the Precision Glass Molding of Chalcogenide Glass (ChG) for Infrared Optics. Micromachines 2018, 9, 337.

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