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Development of thermally stable and moldable chalcogenide glass for flexible infrared lenses

Published online by Cambridge University Press:  30 May 2016

Ju Hyeon Choi ,
Du-Hwan Cha ,
Jeong-Ho Kim  and
Hye-Jeong Kim
Ju Hyeon Choi
Affiliation:
Ultra-Precision Optics Research Center, Korea Photonics Technology Institute (KOPTI), Chumdanbencheo-ro 108 beon-gil 9(WolChul-Dong), Buk-gu, Gwangju 500-779, South Korea
Du-Hwan Cha
Affiliation:
Ultra-Precision Optics Research Center, Korea Photonics Technology Institute (KOPTI), Chumdanbencheo-ro 108 beon-gil 9(WolChul-Dong), Buk-gu, Gwangju 500-779, South Korea
Jeong-Ho Kim
Affiliation:
Ultra-Precision Optics Research Center, Korea Photonics Technology Institute (KOPTI), Chumdanbencheo-ro 108 beon-gil 9(WolChul-Dong), Buk-gu, Gwangju 500-779, South Korea
Hye-Jeong Kim*
Affiliation:
Ultra-Precision Optics Research Center, Korea Photonics Technology Institute (KOPTI), Chumdanbencheo-ro 108 beon-gil 9(WolChul-Dong), Buk-gu, Gwangju 500-779, South Korea
*
a)Address all correspondence to this author. e-mail: kimhj@kopti.re.kr
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Abstract

In this study, the ternary Ge–Sb–Se chalcogenide glass was fabricated by a standard melt-quenching technique for flexible infrared lenses. Chalcogenide glass should have unique thermal and mechanical properties to be applied to precision glass molding (PGM) process. Therefore, the relations between thermal properties and the moldability were investigated for (35–20)Ge–(5–20)Sb–60Se glass systems. The thermal and thermos-mechanical properties were characterized by the differential scanning calorimeter and thermos-mechanical analysis, respectively. Preceding experiments using a pressing tester were conducted before PGM process to evaluate the moldability. The surface condition of both chalcogenide glass disks and Tungsten Carbide (WC) molds were characterized by using an optical microscopy and an interferometer. The preferential compositions in (35–20)Ge–(5–20)Sb–60Se glass systems were selected to produce molded lenses. Finally, the molded chalcogenide lens was successfully fabricated using the preferential compositions and the processing conditions from the preceding experiments using a pressing tester.

Keywords

Ge–Sb–Se chalcogenide glasshigh thermal stabilityprecision glass molding
Type
Articles
Information
Journal of Materials Research , Volume 31 , Issue 12 , 28 June 2016 , pp. 1674 - 1680
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Copyright
Copyright © Materials Research Society 2016 

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References

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