Share Email Print
cover

Proceedings Paper • new

Germanium window with highly durable diamond-like carbon coating for infrared camera of automobile
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

A diamond-like carbon thin film was deposited on the outer face of the germanium (Ge) window to protect the infrared lenses from a harsh environment in automotive application. Infrared transmittance and residual stress of a tetrahedral amorphous carbon (ta-C) thin film by a filtered cathodic vacuum arc (FCVA) source were investigated to increase the lifetime of a Ge window. They were found to have a trade-off relation about the change of the substrate pulse voltage. By introducing methane gas in FCVA deposition process, a hydrogenated ta-C (ta-C:H) thin film of which both IR transmittance and residual stress was improved could be obtained. A Ge window coated with ta-C:H thin film with 1.43 μm thickness showed anti-reflective effect in long-wave infrared. The hardness of ta-C:H thin film on Ge window was higher than 30 GPa. Adhesion, severe abrasion, temperature, humidity and salt solubility tests were carried out in accordance with MIL-C-48497A.

Paper Details

Date Published: 9 September 2019
PDF: 7 pages
Proc. SPIE 11129, Infrared Sensors, Devices, and Applications IX, 111290H (9 September 2019); doi: 10.1117/12.2529690
Show Author Affiliations
Jung H. In, Korea Photonics Technology Institute (Korea, Republic of)
Min W. Seo, Korea Photonics Technology Institute (Korea, Republic of)
Haeng Y. Jung, Korea Photonics Technology Institute (Korea, Republic of)
Seon H. Kim, Korea Photonics Technology Institute (Korea, Republic of)
Ju H. Choi, Korea Photonics Technology Institute (Korea, Republic of)


Published in SPIE Proceedings Vol. 11129:
Infrared Sensors, Devices, and Applications IX
Paul D. LeVan; Priyalal Wijewarnasuriya; Ashok K. Sood, Editor(s)

© SPIE. Terms of Use
Back to Top