Optimized Asphere Fabrication and Finishing, for Future Optical Windows

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-04-C-7042
Agency Tracking Number: B041-035-1319
Amount: $99,061.00
Phase: Phase I
Program: SBIR
Awards Year: 2004
Solitcitation Year: 2004
Solitcitation Topic Code: MDA04-035
Solitcitation Number: 2004.1
Small Business Information
TECHNOLOGY ASSESSMENT & TRANSFER, I
133 Defense Highway, Suite 212, Annapolis, MD, 21401
Duns: 153908801
Hubzone Owned: N
Woman Owned: Y
Socially and Economically Disadvantaged: N
Principal Investigator
 Anthony DiGiovanni
 Sr. Engineer
 (410) 987-3435
 anthonyd@techassess.com
Business Contact
 Sharon Fehrenbacher
Title: CEO
Phone: (410) 224-3710
Email: sharon@techassess.com
Research Institution
N/A
Abstract
Aspherical domes provide lower drag and radar signatures than hemispherical window designs but conventional finishing technologies have not been able to provide adequate optical surfaces. The fabrication of aspherical windows therefore remains a relatively under-developed technology for E/O windows for hypervelocity missiles. Development of deterministic microgrinding, coupled with magnetorheological polishing has made the optical finishing of aspherical domes possible. Hypervelocity windows are exposed to extreme thermal loads as well as requiring high resistance to erosion. Magnesium aluminate spinel is a hard optically transparent material with good thermal shock resistance and is presently being produced in hemispherical domes up to seven inches in diameter as a low-cost replacement for sapphire. Technology Assessment and Transfer will demonstrate that the existing fabrication technology can be extended to produce aspherical domes, and that these domes can be optically finished thereby producing a low-cost approach for the manufacture of hard, aspherical windows for a wide range of missile and hypervelocity applications in the UV, visible and MWIR.

* information listed above is at the time of submission.

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