A fundamental limit is imposed by the size of the diffraction disk of the telescope.
一个基本的极限是由望远镜衍射园面的大小决定的。
In a similar manner, diffraction limits the amount of information that can be optically stored on or retrieved from a digital video disk (DVD).
同样的道理，绕射也限制了以光学方法储存或读取数位影音光碟(VD)的资料量。
Diffraction calculation is the basis of designing optical system of optical disk.
衍射计算是设计光盘光学系统的基础。
Validity of scalar diffraction theory must be checked, because the size of information mark (pit) of optical disk is comparable with or smaller than the laser wavelength.
由于光盘信息符(坑点)尺寸可以和波长相比较或更小，标量衍射理论的有效性必需进行检验。
It is discorered that circular hole diffraction and circular disk diffraction pattern in large aperture convergent beam are different from those of general Fresnel diffraction.
实验中发现，经常使用的大孔径会聚光束的圆孔和圆屏衍射图样不同于一般的菲涅耳圆孔和圆屏衍射图样。
With light wave diffraction theory, the mathematical model of optical field at the recording layer is developed for magneto-optical disk.
运用光波衍射理论，针对磁光盘建立了记录光场的数学模型。
The amplitude and intensity analytic expressions for disk (sphere) and annular aperture Fresnel diffraction are given on the base of scalar diffraction theory.
在标量衍射理论的基础上，给出了圆屏(球)和圆环菲涅耳衍射的振幅及光强解析表达式。
Utilizing convergent beam of large aperture can realize inversion of circular hole diffraction and circular disk diffraction.
利用这种光束可以对微小的衍射物体进行反演放大。
The compound diffraction beam will be propagated toward different directions when the invisible laser beam is vertically projected on the rotary holographic disk.
使用不可见激光束垂直投射到旋转全息圆盘上，产生复数衍射光束向不同方向传播。
The compound diffraction beam will be propagated toward different directions when the invisible laser beam is vertically projected on the rotary holographic disk.
使用不可见激光束垂直投射到旋转全息圆盘上，产生复数衍射光束向不同方向传播。
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