利用肥皂膜的等厚干涉原理，研究了竖直面内肥皂膜条纹位置及薄膜厚度的分布规律，发现竖直面内肥皂膜的厚度为微米和亚微米量级，其分布随着成膜时间的变化而变化：在肥皂膜形成初期，膜厚分布近似于“铃铛”形；在肥皂膜形成中期，膜厚分布为标准的楔形；而在接近破裂时其形状类似于倒立的“漏斗”形。%Distribution properties of soap iflm in vertical plane are investigated via equal thickness interference theory. It is found that the thickness of soap iflm is of micron or sub-micron orders, and the distribution properties are changing with forming time. At the beginning, the soap iflm is bell-shaped, at the middle time, the soap iflm is wedge-shaped and when the soap iflm is going to broke the soup iflm is upside down funnel-shaped.
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