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Proceedings Paper

Optics with diamond-like-carbon overcoat (DOC) provide improved optical performance over traditional DLC films and better cleanability than standard PVD coatings
Author(s): Stan Himelinski; Jim Bacon; Alan R. Hedges; Gregg Davis
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Paper Abstract

DOC is a coating technology that combines a CVD diamond-like carbon (DLC) film and a physical vapor deposition (PVD) coating in a custom coating chamber. DOC coatings combine the best attributes of DLC and PVD, while minimizing their disadvantages. Traditional PVD IR coatings on windows, lenses and mirrors have good optical properties, but are relatively soft, making them easily scratched during cleaning and handling. DLC coatings are extremely durable but have limited optical performance, bandwidth and higher absorption losses. DOC is not quite as hard or durable as DLC, because it is relatively thin. However, DOC is harder and more durable than standard PVD films. The advantage of DOC is that it is able to be integrated into the optical coating design. This allows coatings to be designed with similar performance to a traditional PVD film, but with much improved durability. Many demanding applications from aerospace to 3D printing have found DOC to be a good solution. In this paper various applications that incorporate DLC or PVD coated optics will be compared with DOC coating alternatives, providing insight for possible solutions using this new technology.

Paper Details

Date Published: 27 February 2019
PDF: 7 pages
Proc. SPIE 10914, Optical Components and Materials XVI, 109141F (27 February 2019); doi: 10.1117/12.2510264
Show Author Affiliations
Stan Himelinski, II-VI Infrared (United States)
Jim Bacon, II-VI Infrared (United States)
Alan R. Hedges, II-VI Infrared (United States)
Gregg Davis, II-VI Infrared (United States)

Published in SPIE Proceedings Vol. 10914:
Optical Components and Materials XVI
Shibin Jiang; Michel J. F. Digonnet, Editor(s)

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