Skip Navigation
SBIR/STTR

Durable Silver Mirror Coating Via Ion Assisted, Electron Beam Evaporation For Large Aperture Optics, Phase I

Completed Technology Project

Project Introduction

Durable Silver Mirror Coating Via Ion Assisted, Electron Beam Evaporation For Large Aperture Optics, Phase I
Highly reflective optical coatings with low scatter properties are needed to image very faint objects such as extra-solar planets. Silver has the highest reflectivity of all metals but tarnishes readily upon exposure to atmospheric pollutants. In this research, Surface Optics Corporation (SOC) will develop a non-tarnishing silver mirror coating based an ion assisted, thermal evaporation process. The recipe for this durable silver mirror system was patented by Lawrence Livermore National Laboratory (LLNL) and is based on an alternative deposition method, namely, reactive sputtering. Developing a methodology to manufacture protected silver by ion assisted evaporation will allow these proven designs to be fabricated with SOC?s large aperture coating facility. SOC recently developed and implemented a unique vacuum coating system that utilizes a computer controlled, translating evaporation source. This system is capable of producing highly uniform optical films with low scatter properties, on curved substrates up to 3-meters in diameter. The combination of SOC's novel coating methods and LLNL's novel coating designs, will establish a unique and very valuable coating resource for the astronomical community. More »

Primary U.S. Work Locations and Key Partners

Project Library

Share this Project

Organizational Responsibility

Project Management

Project Duration

This is a historic project that was completed before the creation of TechPort on October 1, 2012. Available data has been included. This record may contain less data than currently active projects.

A final report document may be available for this project. If you would like to request it, please contact us.

^