低压微位移驱动电路及控制方法

讨论了低压微位移驱动电路及控制方法在光电轮廓仪上的运用。采用低压驱动电路驱动压电陶瓷相移器对参考光束进行相移，从而使仪器质量减轻、体积缩小、成本降低。在运用该电路时，为了解决压电陶瓷低电压区非线性误差大的问题，用PC计算机控制压电陶瓷上所加电压的电压值，由摄像头摄取图像并计算出干涉条纹的间隔，然后由PC计算机修改压电陶瓷上所加的电压值，直至干涉条纹相位差达到要求值。该方法的优点是：可消除压电陶瓷低压区的非线性误差，使得开环电路得到闭环的效果；可降低机械零部件的装配难度。     

Synthesis of Chiral Aminophenols Based on Proline and Their Application in Enantioselective Addition of Diethylzinc to Aldehydes

Three 2-{（3R, 7aS )-1, 1-disubstituted-tetrahydro-lH-pyrrolo [ 1,2- c ] [ 1,3 ] oxazol-3-yl} phenols have been synthesized from salicylaldehyde and amino alcohols derived from L-proline, and used as ligands in enantioselective addition of diethylzinc to aldehydes, the ee values of obtained secondary alcohols were found in the range of 0-90%.