Christopher J Coyle

US Patent:

56045824, Feb 18, 1997

Filed:

Feb 27, 1995

Appl. No.:

8/395515

Inventors:

Donald C. Rhoads - Falmouth MA
Christopher Coyle - San Diego CA
Roger Ward - Portmouth RI
Gregory Mooradian - Del Mar CA
Richard Anderson - San Diego CA

Assignee:

Science Application International Corporation - San Diego CA

International Classification:

G01N 2127
G01N 2164

US Classification:

356 73

Abstract:

A spectrometer system includes a processing center, an underwater remote sensor and a communication link coupled therebetween. The sensor is deployed to at least partially penetrate a sediment layer disposed beneath a body of water. The sensor includes a window defining a sediment window plane through which a profile of the sediment layer is observable and a camera, an image plane of which is a conjugate of the window, the camera imaging light from objects in the sediment window plane to generate imagewise data, the imagewise data being transmitted over the communications link to the processing center. The sensor also includes at least one removable cell disposed in the sediment window plane, each removable cell being comprised of a transparent solid material having a void therein, the void in each removable cell for holding a standard material corresponding to the respective removable cell. The sensor further includes a camera filter device having at least one camera filter. Each camera filter is characterized as passing radiant energy within a corresponding emission band of camera wavelengths, the camera filter device being controllable to select a current camera filter.