However, for the actual optical system, its point image become a speckle because of diffraction of light and aberration.
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。
The invariable loss comes from the materials and surface processing of the system itself, such as the loss of Fresnel, ball aberration, diffraction, chromatic aberration and absorb.
固定损耗是由系统自身所用材料、表面处理决定的，包括菲涅耳损耗、球差损耗、衍射损耗、色散损耗、吸收损耗等。
Abstract : As one of the important technical specifications of diffraction grating, diffraction wave front aberration directly affects the grating resolution.
摘要 ：波前像差是衍射光栅的重要技术指标， 它直接影响光栅的分辨率。
As one of the important technical specifications of diffraction grating, diffraction wave front aberration directly affects the grating resolution.
波前像差是衍射光栅的重要技术指标，它直接影响光栅的分辨率。
In this paper, the flat field polychromator (SPD - I) using an aberration - corrected flat fie1d holographic concave diffraction grating as both spectroscopic and oPtical imaging element is re-POrted.
报道一种利用象差校正平场全息凹面衍射光栅作为分光和成象元件的平场多色仪，该多色仪具有谱面平直、使用波段宽、集光本领强、体积小等优点。
On the basis of scalar diffraction theory, this paper analyses the chromatic aberration of the diffractive lenses, and obtains the mathematical expression of the dispersion of the diffractive lenses.
基于标量衍射理论，本文分析了衍射透镜的色差，首次得出了计算其色散的数学表达式。
The producing principle of the point diffraction wavefront was presented, and the relation among the pinhole states, illumination adjustment and the wavefront aberration was analyzed.
介绍了点衍射波前的产生原理，分析了小孔质量状态、照明光路调整状态与波前各个像差分量之间的关系。
Numerical simulation is carried out by means of scalar fluctuation and diffraction theory. The simulation results show that the design obviously lowers system aberration, solves the prob…
利用标量波动衍射理论进行了数值模拟，结果表明，该设计能明显降低系统像差，改变了传统设计方法在大通道数情况下像差过大、边缘通道性能劣化等问题。
Numerical simulation is carried out by means of scalar fluctuation and diffraction theory. The simulation results show that the design obviously lowers system aberration, solves the prob…
利用标量波动衍射理论进行了数值模拟，结果表明，该设计能明显降低系统像差，改变了传统设计方法在大通道数情况下像差过大、边缘通道性能劣化等问题。
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