开口比 meaning in Chinese

aperture efficiency

The diffraction efficiency changing with grating parameters , especially for the situation that gaussian beams diffracted by finite grating , is numerically studied . 3
对单色平面波和有限尺寸高斯光束入射矩形光栅时的衍射效率与光栅栅距、槽深、开口比和入射角等参数的关系进行了仿真计算。
The main works and contributions achieved in this dissertation are concluded as follows : 1 . based on the scalar diffraction theory , the mathematical model of optical configuration of transmissive grating interferometer is established . it indicats that moir interference fringes is affected by many parameters , such as grating pitch , light wavelength , light beam size and incidence angle , etc . the variation that the width , intensity , orientation and contrast of moir interference fringes along with every parameter is numerically analyzed
主要的研究内容和所取得的成果可归纳如下: 1 .基于标量衍射理论,建立了透射式光栅干涉仪光路的数学模型,分析了透射式光栅干涉仪的莫尔干涉条纹与光栅栅距、光栅开口比、光波波长、光斑尺寸、光束入射角等多个参数的关系。