Reduced Print Thru in HEL Deformable Mirrors

Award Information
Agency: Department of Defense
Branch: Missile Defense Agency
Contract: HQ0006-07-C-7743
Agency Tracking Number: B063-053-0389
Amount: $100,000.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2006
Solicitation Topic Code: MDA06-053
Solicitation Number: 2006.3
Small Business Information
5988 Mid Rivers Mall Drive - Suite 236, St. Peters, MO, 63304
DUNS: 101770845
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 George Dube
 (636) 447-9555
Business Contact
 Roland Juhala
Title: Vuce President
Phone: (636) 447-9555
Research Institution
This project will investigate a passive solution to the deformable mirror print through problem. No additional sensor or control subsystems will be required. The high reflector surface will be positioned on the backside of the thin deformable transparent glass sheet. First order theory (uniform temperature through the thickness of the thin glass sheet) indicates that for most glasses there is a thickness that makes this backside reflector athermal with respect to actuator thermal expansion. The thermal expansion and dn/dT of the thin glass sheet cancels the change in optical path caused by the thermal expansion of the actuators and their heating of the mirror substrate. The thermal optic distortion of mirrors heated by simulated actuators will be measured interferometrically and compared to theory. Besides the required change in optical path with temperature, the glass must have physical and chemical properties suitable for fabrication into a thin polished sheet that will be HR coated on one side and AR coated on the other. This project will investigate the most practical actuators, transparent materials and fabrication techniques and apply finite element analysis to guide design modifications to minimize any effects of thermal gradients produced by the actuators and/or laser beam.

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

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