Method for determining the retardation of a material using non-c

Details Method for determining the retardation of a material using non-c Method for determining the retardation of a material using non-c

1998-06-26

2000-03-07

Kim, Robert H.

Optics: measuring and testing

By polarized light examination

With birefringent element

356345, 356357, G01B 902

Patent

active

060347740

ABSTRACT:
A method for determining the optical retardation of an anisotropic material. A beam of light is directed toward a sample of the material and a portion of the reflected beam is collected from the optical interfaces of the material and directed toward an interferometer. The resulting interference signal is analyzed to determine the retardation. The retardation is determined as being the distance between particular peaks of the interference signal. In a further embodiment, light from multiple wavelength light sources is directed toward the sample of the material.

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