myopic astigmatism 近视散光
corneal astigmatism 角膜散光 ; 角膜性散光
astigmatism corrector 象散校正器
astigmatism axis 散光轴
anisotropic astigmatism 各向异性象散现象
cornea astigmatism 角膜散光
myopia astigmatism 近视散光
regular astigmatism 正规散光 ; 规则性散光 ; 规则散光
axial astigmatism 轴向像散 ; 轴上像散
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·2,447,543篇论文数据，部分数据来源于NoteExpress
N-UNCOUNT If someone has astigmatism, the front of their eye has a slightly irregular shape, so they cannot see properly. 散光
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