finite aperture meaning in English

有限孔径

This is related to certain physical limitations of the image sensors , such as finite cell area and finite aperture time
这一点与图像传感器(如：有限栅格区和有限过孔时间)的一定的物理限制条件有关。
Chapter 3 : in this chapter , the propagation characteristic and focusing properties of elegant hermite - cosh - gaussian ( ehchg ) beam through a finite aperture are investigated . the variance of the beam width , the generalized analytical expression of mg2 - factor and the power fraction of the truncated beam are derived theoretically and illustrated numerically
第三章：讨论了eleganthermite - cosh - gaussian ( ehchc )光束通过有限孔径的传播特性和聚焦性质，得到了其光束束宽， m ~ 2因子及能量分数的解析表达式，并分析了影响光束参数的因素及其变化规律。