myopic astigmatism近视散光
cornea astigmatism角膜散光
astigmatism change散光变化
pathological astigmatism病理性散光
astigmatism monitor像散控制器
curvature astigmatism曲率性散光
Astigmatism Distribution象散分布
hyperopic astigmatism远视散光
hypermetropic astigmatism远视散光
In this paper,the method of matrix optics is employed to study the transformation properties of astigmatic elliptic Gaussian beams,the exact formulas of correcting astigmatism and rotary symmetrize transformation in Semiconductor Laser beams are derived.
本文利用矩阵光学方法研究像散椭圆高斯光束的变换特性，推导出正确的半导体激光束的校正像散与旋转对称化变换公式。
参考来源 - 半导体激光束的成形变换The three-mirror astigmatism systems have the merit of less components, no obscuration, long focal length, big field coverage, wide spectrum, excellent stray light eliminating ability, and high modulated transfer function output.
其中，三反射消像散非球面光学系统具有组件少、无遮拦、长焦距、大视场、宽波段、抑制杂光能力强、调制传递函数高等优点，所以也正是目前的研究热点和技术难点。
参考来源 - 用于空间相机的离轴反射式光学系统研究N-UNCOUNT（不可数名词） If someone has astigmatism, the front of their eye has a slightly irregular shape, so they cannot see properly. 散光