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    • 4. 发明申请
    • A METHOD AND A POLARIMETER FOR MEASURING OPTICAL ROTATION OF SUGAR AND OTHER OPTICALLY ACTIVE SOLUTIONS
    • 用于测量糖和其他光学活性溶液的光学旋转的方法和极化
    • WO1992013263A1
    • 1992-08-06
    • PCT/FI1992000017
    • 1992-01-27
    • KORPPI-TOMMOLA, Jouko
    • G01N21/21
    • G01N21/21
    • The invention relates to a method and a polarimeter to measure optical rotation of a sugar or other optically active solution by producing a monochromatic and collimated light beam, which is split into a measuring beam (11) and into a reference beam (12), directing the measuring beam (11) through the optically active solution (1) and by making reference beam (12) to pass the solution cell, directing the original light beam first through a fixed polarizer (5) and then directing each split beam through an analyzer (6), which is rotated at constant speed hence producing a cosine squared waveform for each beam, measuring the phase difference between the cross-polarization positions of the analyzer (6) for the measuring beam (11) and for the reference beam (12) thus allowing for measuring the absolute angle of optical rotation. According to the invention constant triggering pulses are generated by using the steep rising/falling parts of the periodical waves to generate pulses to start and to stop counting procedure on a crystal oscillator counter, and that a first time delay between the consecutive triggering pulses is measured for the measuring (11) and the reference beams (12) and a second time delay for the full half period of one beam, wherein the said phase difference is counted from the said first and second time delays.
    • 本发明涉及一种测量糖或其它光学活性溶液的旋光度的方法和旋光仪,该方法和旋光仪通过产生被分成测量光束(11)并进入参考光束(12)的单色和准直光束 通过光学活性溶液(1)的测量光束(11)和通过使参考光束(12)通过溶液池,首先引导原始光束通过固定偏振器(5),然后将每个分束束引导通过分析器 (6),其以恒定速度旋转,从而为每个光束产生余弦平方波形,测量测量光束(11)和参考光束(12)的分析器(6)的交叉极化位置之间的相位差 ),从而允许测量旋转的绝对角度。 根据本发明,通过使用周期波的陡峭的上升/下降部分来产生恒定的触发脉冲,以产生开始的脉冲并停止对晶体振荡器计数器的计数过程,并且测量连续触发脉冲之间的第一时间延迟 对于测量(11)和参考光束(12)以及一个光束的全半周期的第二时间延迟,其中所述相位差从所述第一和第二时间延迟计数。