Freeform Optical Systems for Defense System Optics

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$99,992.00
Award Year:
2007
Program:
STTR
Phase:
Phase I
Contract:
HQ0006-07-C-7795
Award Id:
83276
Agency Tracking Number:
B074-006-0097
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
7900 West 78th St., Suite 300, Minneapolis, MN, 55439
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
938966090
Principal Investigator:
DavidStephenson
Vice President
(952) 832-5515
dave.stephenson@thirdwavesys.com
Business Contact:
TroyMarusich
Chief Technical Officer
(952) 832-5515
troym@thirdwavesys.com
Research Institute:
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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