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Optimization of multispectral chalcogenide glass for large-size fabrication
Optics Letters
|March 22, 2023
Summary
Researchers developed a novel, large-size multispectral chalcogenide glass (0.51–11.2 µm) for visible and infrared imaging. A new thermal analysis method aids in creating advanced optical materials for broader applications.
Area of Science:
- Materials Science
- Optical Engineering
- Infrared Technology
Background:
- Chalcogenide glass is crucial for infrared (IR) lenses in passively athermalized long-wave IR devices.
- Lack of large-scale multispectral chalcogenide glass hinders multispectral imaging systems combining visible, near-IR, and mid-IR spectra.
Purpose of the Study:
- To develop a novel multispectral chalcogenide glass suitable for large-size fabrication.
- To introduce a new method for evaluating the glass-forming ability of chalcogenide glasses for large-scale production.
Main Methods:
- Compositional optimization of GeS2–Ga2S3–CsCl glass with Sb2S3 addition.
- Fabrication of a record-large Ø120 mm chalcogenide glass.
- Three-stage thermal analysis simulating melt-quenching in a vacuum-sealed silica ampoule.
Main Results:
- A novel chalcogenide glass with a broad transmission window (0.51–11.2 µm) was successfully fabricated in a record Ø120 mm size.
- The developed glass can function as a multispectral lens for co-aperture IR optical systems, transmitting visible and IR signals.
- A simple and convenient three-stage thermal analysis method was proposed for screening chalcogenide glasses with ultrahigh glass-forming ability.
Conclusions:
- This work presents an innovative multispectral chalcogenide glass with significant potential for advanced optical systems.
- The new thermal analysis technique facilitates the development of large-size chalcogenide glass components.
