Accession Number:

AD0848324

Title:

Investigation of Contrast Degeneracy with Increasing Scatter Concentration for a Water Medium When Illuminated with and without a Circularly Polarized Source

Descriptive Note:

Technical publication

Corporate Author:

NAVAL WEAPONS CENTER CHINA LAKE CA

Personal Author(s):

Report Date:

1968-12-01

Pagination or Media Count:

78.0

Abstract:

Luminous flux returns were measured from a black and white painted 5- inch x 12-inch aluminum target placed in a water filled 60 x 30 x 25 cm aquarium illuminated by an external circularly polarized CP tungsten projector lamp. Simultaneously, apparent background flux containing backscatter from the illuminating beam was measured with and without a circular analyzer on the Model 2000 Gamma-Scientific telephotometer. Turbidity of the water was controlled by adding varied sizes of polystyrene latex spheres of relative refractive index m 1.20. Contrasts were determined as a function of particle diameter and amount concentration for six discrete-size spheres ranging from 0.126 microns to 1.099 microns and three size distributions from 6 to 100 microns.

Subject Categories:

  • Photography
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE