Investigation of Contrast Degeneracy with Increasing Scatter Concentration for a Water Medium When Illuminated with and without a Circularly Polarized Source
Abstract
Luminous flux returns were measured from a black and white painted 5- inch x 1/2-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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1968
- Accession Number
- AD0848324
Entities
People
- Gary D. Gilbert
Organizations
- Naval Air Weapons Station China Lake