对于实际光学系统，由于光的衍射和像差，使所成的点像为一弥散斑。
However, for the actual optical system, its point image become a speckle because of diffraction of light and aberration.
模型有较强的通用性，适用于传统仅矫正屈光不正(近视、远视、散光)的光学区模型，也适用于波前像差引导的激光眼屈光手术。
The model not only can be applied to the correction of refractive errors such as myopia and astigmatism, but also can be used in wavefront guided laser refractive surgery.
本文用像差平衡的方法求出优化的全息分路器光路结构参量。
Optimized parameters of the optical configuration of holographic wavelength demultiplexer (HWD) have been obtained with aberration balancing.
目的：借助波阵面像差仪研究正视眼及屈光不正眼的高阶像差。
Objective: To study the higher order aberrations of emmetropic and ametropic eyes with wavefront aberrometer.
空间相干光通信中接收天线像差会使光外差效率下降。
Heterodyne efficiency is reduced by aberration of receiving antenna for space coherent optical communication.
目的探讨儿童波前像差的分布情况以及儿童高阶像差与屈光不正之间的关系。
Objective To explore the distribution of optical wavefront aberrations and the relation between the higher order aberrations and refractive error in children.
为了把波像差的影响减少至最小，我们建议使用平行光做参考光，并用逆光路再现母全息图。
In order to decrease the wave aberration, we propose to use the parallel light as reference light, and reconstruct the master hologram by using the inverse light road.
球对称梯度折射率微球透镜具有体积小、光路短、外形易加工、使用易调整，且无螺旋光线、像差小等优越性能。
The spherical gradient refractive index micro-lens with small volume and short optical path can be easily shaped and conveniently adjusted, and has no spiral rays and low spherical aberration.
采用C语言完成了灰度转换、图像差分、中值滤波、光流估计、形心确定、高速球控制等软件模块的程序设计，调试出程序执行时间并做了实时性分析；
Most software module programs are compiled with the language C, and the execution time of the program is debugged and the real-time performance compared as well.
重点分析了由眼球的屈光介质引入的光学像差对人眼视觉质量的影响。
The aberration by the human eye optical structure to affect vision quality are mainly reviewed.
人们亦发现波前像差能为传统的屈光不正提供良好的预测。
Wavefront aberrations were found to provide a good prediction of the conventional refractive error.
该方法具有与全息干涉计量相同的灵敏度，光路简单，结构紧凑，波像差小，防震要求低等特点。
The method has the speciality, just as same sensitivity as the holographic interferometry, simple light route, compact structure, a low demand of shock resistance etc.
结论：在实际用眼中，由于调节反应诱发屈光力变化范围以及角膜的像差补偿作用，正视眼总能维持较高的视觉质量。
In fact, most of the time the moderate volume of accommodation response and the corneal compensation of inter eye wavefront make a stable and qualified vision quality possible.
结论：在实际用眼中，由于调节反应诱发屈光力变化范围以及角膜的像差补偿作用，正视眼总能维持较高的视觉质量。
In fact, most of the time the moderate volume of accommodation response and the corneal compensation of inter eye wavefront make a stable and qualified vision quality possible.
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