近几年在学习前人研究成果的基础上,经过研究,设计了一种行星传动式的椭圆仪(文中简称椭圆仪),试制后证明原理正确、结构合理简单、绘图精确、使用方便、具有实用价值。一、绘图原理图1所示。圆S_1是以长半轴a为半径所画的圆,圆S_2是以短半轴b为半径所画的圆, In recent years, based on the research results of predecessors, we have designed a planetary transmission ellipsometer (hereinafter referred to as ellipsometer), which proves that the principle is correct, the structure is reasonable and simple, the drawing is accurate, the use is convenient, and the Practical value. First, the schematic diagram shown in Figure 1. The circle S_1 is a circle drawn with the radius of the long half axis a, the circle S_2 is a circle drawn with the radius of the short half axis b,