Freeform Optical Systems for Defense System Optics

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-07-C-7795
Agency Tracking Number: B074-006-0097
Amount: $99,992.00
Phase: Phase I
Program: STTR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: MDA07-T006
Solicitation Number: N/A
Small Business Information
THIRD WAVE SYSTEMS, INC.
7900 West 78th St., Suite 300, Minneapolis, MN, 55439
DUNS: 938966090
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Stephenson
 Vice President
 (952) 832-5515
 dave.stephenson@thirdwavesys.com
Business Contact
 Troy Marusich
Title: Chief Technical Officer
Phone: (952) 832-5515
Email: troym@thirdwavesys.com
Research Institution
 GEORGIA INSTITUTE OF TECHNOLOGY
 Steven Liang
 813 Ferst Drive, MARC 380
Atlanta, Georgia, GA, 30332
 (404) 894-8164
 Nonprofit college or university
Abstract
Freeform optical surfaces offer advantages over axis-symmetric surfaces in the ability to reduce optical sizes, increase performance and reduce aberrations. However, the description, fabrication and metrology of these surfaces can be difficult and costly, prohibiting their ability to achieve their full potential. Fabrication of these surfaces can be difficult, since they are not axis-symmetric and have varying local radii of curvature, rendering grinding, lapping and polishing of these surfaces to be onerous operations. A method to overcome the difficulties in fabrication of freeform surfaces is to apply ductile mode machining (DMM) to eliminate grinding, lapping and polishing. DMM has been successfully applied to SiC mirror 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 STTR activity extends the technology of DMM to freeform configurations enabled by physics-based modeling techniques. We will further develop and enhance its modeling capability and apply to CVD coated SiC freeform optics. In Phase I we will demonstrate the feasibility of DMM to machine a freeform surface in a laboratory environment.

* information listed above is at the time of submission.

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