Accession Number : ADD008298

Title :   Apparatus for Determining the Transmissivity of an Optical Medium.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON DC

Personal Author(s) : Smith,Chester L ; Everswick,David N

Report Date : 05 Sep 1978

Pagination or Media Count : 5

Abstract : Three photometers are positioned at three points P1, P2 and P3, aligned with each other and with an illuminating flare, and located at equal distances d from each other, with the middle photometer at a distance D, greater than d, from the flare; the illuminations E1, E2, and E3 simultaneously received by the three photometers from the flare are recorded; and the transmissivity T, or transmission per mile, of the atmosphere traversed by the light is calculated.

Descriptors :   *Patents, *Optical instruments, *Permeability, Photometers, Illuminants, Flares, Correlation techniques, Signal processing, S band, Recording systems, Methodology, Schematic diagrams, Memory devices

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE