Fiber-Image- Guide Airframe Roughness Profilometer

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: W31P4Q-08-C-0055
Agency Tracking Number: 07SB2-0050
Amount: $98,881.00
Phase: Phase I
Program: SBIR
Awards Year: 2007
Solicitation Year: 2007
Solicitation Topic Code: SB072-003
Solicitation Number: 2007.2
Small Business Information
20600 Gramercy Place, Suite 203, Torrance, CA, 90501
DUNS: 612439146
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Jun Ai
 Research Scientist, EO Systems
 (310) 320-1066
Business Contact
 Engin Arik
Title: President and CEO
Phone: (310) 320-1066
Research Institution
To address the DARPA need for airframe crack nucleation prediction through surface roughness measurement, Luminit, LLC proposes to develop a new Fiber-Image-Guide Airframe Roughness Profilometer (FIGARP), based on a novel phase resolvable full-field optical coherence tomography (OCT) and a handheld Fiber-Image-Guide (FIG) probe. OCT offers rapid tomographic imaging of strongly scattering materials. The FIG probe offers simultaneous acquisition of a 2D pixel array from a surface without physical contact. The portable FIGARP requires no anti-vibration measures. It can measure the surface topography of a real aircraft in < 0.1 ms, with sub-nanometer depth and sub-micron lateral resolution. The FIGARP will be built with COTS components and packaged in a 19-inch rack-mountable box. Measurement is controlled with user-friendly software on a laptop computer. In Phase I, Luminit will demonstrate the feasibility by studying physics and data-driven models on fatigue crack growth as a function of surface roughness, and developing a proof-of-concept FIGARP for inspecting aircraft Al alloys of varying surface quality. In Phase II, Luminit will develop algorithms and computer programs to simulate and predict crack nucleation as a function of measured surface roughness, and integrate the programs into a commercial FASTRAN software package.

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

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