高精度光电自动折射仪的瞄准方法及其实现

介绍了一种用于高精度光电自动折射仪并采用振动狭缝瞄准的自动瞄准方法,说明了影像宽度、振动狭缝宽度和振幅之间的几何尺寸关系。该瞄准方法采用计算机控制,实时采集经被测样品出射的单色光信号,根据该信号的幅值和相位自动确定瞄准点。给出了实现该方法的电路原理、系统组成。在365～2600nm范围内对大量光学材料进行测试表明,振动狭缝法的瞄准精度优于±0.1角秒。

Collimating Method and Its Realization for the Photoelectric Automatic Refractometer with high Precision

A automatic collimating method with vibrating slit for the photoelectric automatic refractometer with high precision was introduced in this paper and geometry size relation of width among image and vibrating slit and amplitude was described also. This collimating method was realized through acquiring really-time signal of monochromatic light from sample measured and judging automatically collimating point on the basis of amplitude and phase of this signal by computer. The circuit principle and constitution were represented in detail. Many optical materials are measured in the wavelength rang of 365 to 2600 nm .The results show the precision of this collimating method is batter than ?0.1".