NASA SBIR 2008 Solicitation


PROPOSAL NUMBER: 08-1 S2.05-8681
SUBTOPIC TITLE: Optics Manufacturing and Metrology for Telescope Optical Surfaces
PROPOSAL TITLE: High Reflectivity, Broad-Band Silver Coating

SMALL BUSINESS CONCERN (Firm Name, Mail Address, City/State/Zip, Phone)
Surface Optics Corporation
11555 Rancho Bernardo Road
San Diego, CA 92127 - 1441
(858) 675-7404

PRINCIPAL INVESTIGATOR/PROJECT MANAGER (Name, E-mail, Mail Address, City/State/Zip, Phone)
David A. Sheikh
11555 Rancho Bernardo Road
San Diego, CA 92127 - 1441
(858) 675-7404

Expected Technology Readiness Level (TRL) upon completion of contract: 5

TECHNICAL ABSTRACT (Limit 2000 characters, approximately 200 words)
Future space telescopes such as the Super Nova Acceleration Probe (SNAP) require exceptionally reflective coatings applied to mirrors several meters in diameter. In 2007, Surface Optics Corporation (SOC) applied a protected silver coating to the Kepler Space telescope's 1.4-m primary mirror. Although SOC's coating design met the reflectance requirements for Kepler, the protective layers absorb too much energy in the UV and visible spectral regions to meet SNAP's science objectives.

In this research, SOC will improve the spectra performance of its current protected silver coating, by modifying the protection chemistry, as well as, the deposition process. SOC's silver coating design is based on a protection recipe patented by Lawrence Livermore National Laboratory (LLNL). Recent SOC IRAD results showed that significant modifications to the basic LLNL protection scheme are possible, without sacrificing coating durability.

In Phase I, a variety of protective compounds will be fabricated by an ion-assisted evaporation process and optimized for their protective properties, adhesion characteristics, and effect on coating reflectivity. In addition, SOC will create a more precise method to deposit protective NiCrNx atomic clusters, which are a critical element of LLNL's silver protection recipe. By modifying SOC's evaporation system and monitoring process, it is expected the necessary volume of these highly absorbing clusters may be reduced by a factor of 2, while still providing adequate engineering margin to insure durability. These modifications will significantly improve coating reflectance in the UV and visible spectral regions.

In Phase II, scale-up issues will be addressed and the improved silver coating process will be applied to a 2.2-m mirror substrate in SOC's 3.3-meter vacuum coating chamber.

POTENTIAL NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
Coronagraphs, space telescope programs such as TPFand SNAP, and space-based interferometers

POTENTIAL NON-NASA COMMERCIAL APPLICATIONS (Limit 1500 characters, approximately 150 words)
TMT, LSST, Hobby-Eberly, Keck, BBSO and many other multi-mirror telescope and instrument systems.

NASA's technology taxonomy has been developed by the SBIR-STTR program to disseminate awareness of proposed and awarded R/R&D in the agency. It is a listing of over 100 technologies, sorted into broad categories, of interest to NASA.

Large Antennas and Telescopes
Optical & Photonic Materials

Form Generated on 11-24-08 11:56