Extended Range Optical Underwater Imaging

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$70,000.00
Award Year:
2004
Program:
SBIR
Phase:
Phase I
Contract:
N00014-05-M-0006
Award Id:
70248
Agency Tracking Number:
N042-176-0016
Solicitation Year:
n/a
Solicitation Topic Code:
n/a
Solicitation Number:
n/a
Small Business Information
11805 North Creek Parkway S., Suite 113, Bothell, WA, 98011
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
801518747
Principal Investigator:
Steve Tidwell
Principal Investigator
(425) 482-1100
steve.tidwell@aculight.com
Business Contact:
Dennis Lowenthal
VP of Research & Development
(425) 482-1100
dennis.lowenthal@aculight.com
Research Institution:
n/a
Abstract
The Navy needs a compact extended range underwater imaging system that can image through > 6 attenuation lengths with 0.25" resolution. Present systems are limited by scattering to ~ 5 attenuation lengths. To meet the need, we propose a compact, adaptive raster scanner, using a doubled Yb fiber laser for the transmitter, a wide field-of-view (FOV) receiver, and an annular APD detector array, enabling adaptive data processing. The fiber laser offers excellent packaging, robustness, and output characteristics for improved S/N. The receiver offers improved collection efficiency, and the annular array adaptively balances S/N and resolution needs. The proposed system is estimated to have two decades more dynamic range than current imaging systems. Phase I is a design study on the proposed system. Optical design, together with Monte Carlo modeling simulations for various underwater scenarios, yields an optimal optical layout, and analyses of the efficiencies, S/N and resolution capabilities. We develop a preliminary packaging concept for a small underwater vehicle, together with size and weight estimates. In the Option, we define the electronics and interfaces, and develop a power budget for the complete system. The Phase I preliminary design leads to detailed design and construction of a prototype in Phase II.

* information listed above is at the time of submission.

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