astigmatic
词根词缀：
astigmatic adj. 散光的
a 无 + stigma 标志；斑点 + tic 有…性质的，属于…的，具有…的 → 聚不到一个点 → 散光的
stigma n. 污点；不名誉的事
stigmatize v. 玷污
stigm 标志；斑点 + atize → 给〔别人〕加污点 → 玷污
数据来源：新东方英语词汇速记大全
相关例句：
The issue on group velocity dispersion, self phase modulation, Kerr-lens mode-locking and self-starting of laser oscillator has been studied, and the compensation for astigmatic of cavity and for dispersion of self-mode-locked femtosecond Ti: Sapphire oscillator are also analyzed.
研究了飞秒脉冲激光器中的群速度色散、自相位调制、克尔透镜锁模以及锁模自启动问题；分析了自锁模飞秒Ti：Sapphire激光器的色散补偿与激光谐振腔的像散补偿问题；
Conclusion: Astigmatic axis can be changed with growth of the age and distributed as inverse astigmatism.
结论：散光轴向可随年龄增长而改变，并呈逆规性散光状态的变化。
In addition, a common method for astigmatic compensation was introduced when allow for folding cavity's astigmation.
针对折叠腔的像散，推出了常用的一种腔内插入布氏片的像散补偿方法。
A simple method using an astigmatic cavity to determine the thermal lens of laser crystals is reported.
给出一种测量激光器稳定运转时增益介质中热透镜焦距的方法。
By using Wigner distribution function, the beam combination characteristics of general astigmatic Gaussian beams are studied. The analytical formulas of intensity profiles and beam propagation factor ( M 2) for incoherent and coherent combinations are derived.
利用Wigner分布函数，对复杂像散高斯光束的并合问题进行了详细研究，得到了相干和非相干并合光束的光强分布和M2因子的解析表达式。（2）总论；
Possibility of producing image-plane holograms of astigmatic system is analyzed theoretically, and verified experimentally.
从理论上分析了象散光学系统产生象平面全息图的可能性，并在实验上得到证实。