Sandra Jean Lane

US Patent:

43508901, Sep 21, 1982

Filed:

Dec 12, 1980

Appl. No.:

6/215596

Inventors:

Bruce D. Geelhood - La Mesa CA
Gary F. Mastny - San Diego CA
Jerry E. Solomon - San Diego CA
Edward J. Wesley - San Diego CA
Elek Lindner - San Diego CA
Carol A. Dooley - San Diego CA
Sandra M. Lane - San Diego CA

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

G01J 142
G01T 120
F01C 300

US Classification:

250372

Abstract:

A device for monitoring low levels of light emission in a selected underwr environment is provided with a photodetector having a light sensitive surface oriented into the environment, the photodetector generating electrical signals which are representative of light impinging upon the light sensitive surface. A window is positioned between the light sensitive surface and the underwater environment to protect the photodetector from the underwater environment, and a first material is positioned between the window and the underwater environment to prevent biological growth upon the window. A second material is placed in cooperative relationship with the first material to shift the wavelengths of certain light photons occurring in the underwater environment from a first wavelength range to a second wavelength range, in order to increase the attenuation lengths of the photons before they pass through the window.