| 摘要 |
PURPOSE:To sufficiently shorten the response delay of a light signal to an electric signal by arranging an auxiliary electromagnet in the polarization direction of a light signal incident on a thin film of a magnetic body and applying an electric signal which has the opposite polarity from the electric signal applied to the electromagnet. CONSTITUTION:The auxiliary electromagnet 24 which have magnetic poles opposite each other across the thin magnetic material film 18 is arranged in the polarization direction (angle theta = 45 deg.) when the light signal 100 is incident on the thin magnetic material film 18. Then, the electric signal having the opposite polarity from the electric signal applied to the electromagnet 10 as a main electromagnet 24 is applied to the auxiliary electromagnet 24. Consequently, when a pulse signal is outputted from the thin magnetic material film 18 in the form of a light signal, the pulse signal 106 turns on and off in synchronism with the on-off state of the pulse signal 102 and the magnetism direction of magnetic particles of the thin magnetic material film 18 is changed forcibly with the pulse signal 106, so that the response delay of a light signal 108 which has passed through the thin magnetic material film 18 and an analyzer is improved.
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