Method for measuring birefringence

Details Method for measuring birefringence Method for measuring birefringence

1989-10-04

1990-11-27

Rosenberger, Richard A.

Optics: measuring and testing

By polarized light examination

With polariscopes

250225, 356 35, G02F 101, G01B 1118

Patent

active

049731637

ABSTRACT:
The combination of a polarizer and an analyzer, and a sample interposed therebetween are rotated relative to each other to determine the relationship between the angle of rotation and the intensity of light transmitted through the arrangement. The birefringence of the sample is obtained from the retardation values calculated from the result of the determination. When the determination is made for two kinds of light with different wavelengths close to each other, the retardation can be determined straightforwardly. When at least three kinds of light with different wavelengths are used for the determination, different retardation values are obtained for the respective wavelengths for a highly accurate analysis.

REFERENCES:
patent: 3177761 (1965-04-01), Redner
patent: 3376652 (1968-03-01), Flader
patent: 4554449 (1985-11-01), Taniudri et al.
patent: 4849623 (1989-07-01), Osaki et al.

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