dispersion circle meaning in English

散布圆

3 . a raytrace model of both co - axis and non - axis beam propagations for high - power solid - state laser systems has been set up and simulations on shots have been conducted to get the spot distribution at target point . according to the requirement of system design and theory of mathematic statistics , the dispersion circle and frequency distribution , which optimize the stability allocation of optical components , have been presented
3 、建立了共轴与非共轴相结合的光线追迹模型，通过对大型固体激光装置打靶的仿真模拟，获取光束在靶点处的弹着点分布，依据总体设计要求，运用数理统计原理，采用弥散圆和频率分布方法对弹着点分布进行分析，优化光学元件稳定性分配指标。