Freeform Optical Systems for Defense System Optics

Award Information
Agency:
Department of Defense
Branch
Missile Defense Agency
Amount:
$750,000.00
Award Year:
2009
Program:
STTR
Phase:
Phase II
Contract:
W9113M-09-C-0028
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:
TroyMarusich
Chief Technical Officer
(952) 832-5515
troym@thirdwavesys.com
Business Contact:
LisaFerris
Chief Operating Officer
(952) 832-5515
lisa.ferris@thirdwavesys.com
Research Institute:
Western Michigan University
John Patten
1903 West Michigan Ave
College of Engineering
Kalamazoo, MI, 49008
(269) 276-3246
Nonprofit college or university
Abstract
Freeform optical surfaces offer advantages over axisymmetric 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 axisymmetric and have varying local radii of curvature, rendering grinding, lapping and polishing of these surfaces untenable. 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 demonstrated on SiC mirror representative of freeform optics in Phase I. 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, enhance and validate the modeling capability and apply it to CVD coated SiC freeform optics. Backed by modeling data, we will perform a set of machining experiments to ascertain the DMM operating envelope and subsequently demonstrate the fabrication of a full scale freeform optic.

* information listed above is at the time of submission.

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