MAGNETO-OPTICAL SPECTRAL INSTRUMENT, MAGNETO-OPTICAL SPECTRAL MEASUREMENT METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To calibrate and efficiently measure an absolute value of a signal observed as a magneto-optical effect.

SOLUTION: A magneto-optical spectral instrument 1 includes: linear polarizing plates 4 and 7 with rotary mechanisms which can adjust angles ϕ1and ϕ2of respective polarization planes; first calculation means 51 for respectively calculating an absolute value 43 of a Kerr rotation angle based on each measurement value 41 in each of angles of the polarization planes on respective linear polarizing plates 4 and 7 by using a rotary polarizer method; correlation discrimination means 52 for discriminating existence of correlation between the absolute value 43 of the Kerr rotation angle and the angle ϕ1 of an incident light polarization plane to be a polarization plane on the first linear polarizing plate 4; second calculation means 53 which when absence of correlation is determined, calculates a spectrum 44 of a Kerr rotation angle of a sample based on a measurement value 42 using a polarization modulation method; and third calculation means 54 for performing multiplication for suiting a value of the Kerr rotation angle in the spectrum 44 to the absolute value 43 of the Kerr rotation angle and calculating the calibrated spectrum as a spectrum 45 of magneto-optical characteristics of the sample.

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