Accession Number : ADD009897

Title :   Apparatus for Monitoring Low Level Light Emission in Underwater Environment.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Geelhood,Bruce D ; Mastny,Gary F ; Solomon,Jerry E ; Wesley,Edward J ; Lindner,Elek

Report Date : 21 Sep 1982

Pagination or Media Count : 7

Abstract : A device for monitoring low levels of light emission in a selected underwater 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. (Author)

Descriptors :   *Patents, *Light, *Monitoring, Low level, Underwater, Photodetectors

Subject Categories : Test Facilities, Equipment and Methods
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE