通过对光学干涉系统结构设计和元件参数选择，最大限度地优化了干涉条纹的可见度，并设计出零背景光强标准硅球直径精密测量系统。
On the basis of structure design of optical system and parameter option of optical components, the visibility of interference fringe with zero background intensity is optimized.
对于理想的相干光，影响干涉条纹可见度的主要因素是光波的光强。
For an ideal coherent light, the chief factor that affects fringe visibility is light intensity.
随着光束间距的增大，干涉条纹间距减小，条纹数目增多，条纹可见度减小；
With increasing beam separation, the number of interference fringes increases and the fringe separation and visibility decrease.
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