Polariscope and filter therefor
OwnerZinovy V. Reytblattinventor
Life of this patent
Estimating the term…
Abstract
The filter comprises a multiplicity of light polarizing elements which polarize light in a plurality of planes, and a multiplicity of filtering means associated with the light polarizing elements. In a polariscope, light is directed from a source through such a filter to the specimen to be analyzed. Light passed through the specimen once or twice is coupled through another such filter termed an analyzer. In certain embodiments, the polarizer and the analyzer are combined. Patterns representing the stress in the specimen are produced. The pattern includes isochromatics and a number of isoclinics.
Claims29
In a polariscope for analyzing the stress in a specimen, comprising a polarizer for location remote from the specimen and having a multiplicity of first light polarizing elements and a multiplicity of first light filtering means, said first light polarizing elements polarizing light in a plurality of first directions, said first light filtering means having a corresponding plurality of filtering wavelengths, all of said first light polarizing elements having any given first direction of polarization being associated with all of said first light filtering means having any given filtering wavelength, an analyzer for location remote from the specimen and having a multiplicity of second light polarizing elements and a multiplicity of second light filtering means, said second light polarizing elements polarizing light in a corresponding plurality of second directions respectively normal to said first directions, said second light filtering means transmitting only said plurality of wavelengths.
In a polariscope of analyzing the stress in a specimen, comprising a polarizer for location adjacent to one side of the specimen and being divided into a multiplicity of polarizer sections and having a predetermined polarizer point, each of said polarizer sections including a number of elongated first light polarizing elements extending radially from said polarizer point and respectively having radial axes and polarizing light therealong, an analyzer for location adjacent to the other side of the specimen and being divided into a corresponding multiplicity of analyzer sections and having a predetermined analyzer point, each of said analyzer sections including a corresponding number of elongated second light polarizing elements extending radially from said analyzer point and respectively having radial axes and polarizing light planes respectively normal thereto, said second light polarizing elements being respectively aligned with the associated first light polarizing elements.
In a reflection polariscope for analyzing the stress in a specimen, comprising a polarizer for location adjacent to one side of the specimen and being divided into a multiplicity of sections and having a predetermined point, each of said sections including a number of elongated light polarizing elements extending radially from said point and having radial axes and inducing polarization at an angle of 45.degree. thereto.
In a reflection polariscope for analyzing the stress in a specimen, comprising a slab of photoelastic material, a first polarizer on one side of said slab and being divided into a multiplicity of first polarizer sections and having a predetermined first polarizer point, each of said first polarizer sections including a number of elongated first light polarizing elements extending radially from said first polarizer point and respectively having radially directed axes and polarizing light therealong, a second polarizer bonded to the other side of said slab and being divided into a corresponding multiplicity of second polarizer sections and having a predetermined second polarizer point, each of said second polarizer sections including a corresponding number of elongated second light polarizing elements extending radially from said second polarizer point, respectively having radial axes and polarizing light in directions substantially normal thereto, said second light polarizing elements being respectively aligned with the associated first light polarizing elements.
Dependencies are inferred from the claim text.