Conformal Sensor Window

Award Information
Agency: Department of Defense
Branch: Navy
Contract: N68936-08-C-0057
Agency Tracking Number: N073-181-0370
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2008
Solicitation Year: 2007
Solicitation Topic Code: N07-181
Solicitation Number: 2007.3
Small Business Information
7900 West 78th St., Suite 300, Minneapolis, MN, 55439
DUNS: 938966090
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Troy Marusich
 Chief Technical Officer
 (952) 832-5515
Business Contact
 Lisa Ferris
Title: Chief Operating Officer
Phone: (952) 832-5515
Research Institution
Conformal sensor windows offer advantages over axisymmetric surfaces in the ability to reduce drag and weight. Materials of interest include spinel, polycrystal alumina, and ALON. However, the description, fabrication and metrology of these surfaces can be costly, or even impossible. Fabrication of these surfaces is difficult, since they are not axisymmetric and can have varying local radii of curvature, rendering grinding, lapping and polishing of these surfaces untenable. A method to overcome these difficulties in fabrication is to apply ductile mode machining (DMM) to eliminate grinding, lapping and polishing. DMM has been successfully applied to SiC mirror and Infrasil 302 glass transmission surfaces to achieve the requisite surface finish and figure error for axis-symmetric optics. Through the use of physics-based modeling, DMM conditions can be identified where material removal results in ductile chip formation, damage free surfaces and excellent surface finish. This SBIR activity extends the technology of DMM to torroidal configurations enabled by physics-based modeling technology. We will further develop and enhance its modeling capability for application to spinel workpieces. In Phase I we will demonstrate the feasibility of DMM to machine a spinel torroidal window in a laboratory environment with Breault performing the requisite metrology.

* Information listed above is at the time of submission. *

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