| 摘要 |
PURPOSE:To facilitate the measurement of the shift of an absorbing axis, by calculating the angle reaching a point where the intensity of transmitted light becomes min while the specimen to be measured placed between two polarizers forming a Nicol optical system is rotated around the axis of the optical system. CONSTITUTION:An orthogonal Nicol optical system is constituted of a light source 1, two polarizers 3a, 3b arranged so that absorbing axes mutually cross at right angles and a light receiver 4. A specimen 2 to be measured is held between both polarizers 3a, 3b by a holder 5 so that the surface thereof crosses the X-axis of the orthogonal Nicol optical system at right angles. Transmitted light is detected by the light receiver 4 while the specimen 2 is rotated around the axis X and recorded by a recorder 6. By this mechanism, the relation of the intensity and rotary angle of transmitted light is displayed by the recorder 6 and the shift angle of the absorbing angle of the specimen 2 to be measured can be calculated instantaneously.
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