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Additive Nanostructured Arrays for BBAR

Award Information
Agency: Department of Defense
Branch: Army
Contract: W909MY-20-P-0033
Agency Tracking Number: A201-045-0087
Amount: $111,500.00
Phase: Phase I
Program: SBIR
Solicitation Topic Code: A20-045
Solicitation Number: 20.1
Solicitation Year: 2020
Award Year: 2020
Award Start Date (Proposal Award Date): 2020-06-19
Award End Date (Contract End Date): 2021-02-05
Small Business Information
300 Ringgold Industrial Parkway
Danville, VA 24540-1111
United States
DUNS: 623702557
HUBZone Owned: No
Woman Owned: No
Socially and Economically Disadvantaged: No
Principal Investigator
 Francois Chenard
 (434) 483-4304
Business Contact
 Francois Chenard
Phone: (434) 483-4304
Research Institution

U.S. Army sensor systems are complex and include many optical elements of different infrared lensing materials (Ge, ZnS, GaAs, and CaF2) to fully compensate for the optical aberrations over the broad 3-12 micron band.  Typical anti-reflective (AR) interference coatings are employed on the infrared optics to reduce Fresnel reflections.  However, broadband AR (BBAR) interference coatings for 3-12 micron band are expensive, time consuming, and the reflectivity is sensitive to angle of incidence and polarization.  The proposed work will design, model and demonstrate proof-of-concept methods of creating additive nanostructured arrays for BBAR on infrared optics.  The nanostructured optical elements on the lens surface will reduce the reflection below 1% in the 3-12 micron band at incident angles of up to 60°.  Our novel anti-reflective surface will consist of growing a random arrangement structure of features in sub-wavelength scale size and depth.  This new additive method will be applicable in a short process time and at low cost to uncoated infrared optics 12-155mm in diameter and with a curvature of twice the radius.  The innovative additive manufacturing approach will be investigated in details and plans to develop and fabricate prototypes during the Phase II effort will be reported.

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

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