A review of the precision glass molding of Chalcogenide glass (ChG) for infrared optics

Tianfeng Zhou*, Zhanchen Zhu, Xiaohua Liu, Zhiqiang Liang, Xibin Wang

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

59 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number337
JournalMicromachines
Volume9
Issue number7
DOIs
Publication statusPublished - 2 Jul 2018

Keywords

  • Aspherical lens
  • Chalcogenide glass
  • Freeform optics
  • Infrared optics
  • Precision glass molding

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