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光栅图象    
相关语句
  grating image
    A NEW METHOD TO MAKE TWO DIMENSIONAL GRATING IMAGE
    一种制作二维全息光栅图象的新方法
短句来源
    Grating Image Digital Mine Mpa
    光栅图象数字化矿图
短句来源
    The preprocessing methods of grating image are studied, and the 3D object surface data is reconstructed.
    研究了光栅图象的投影、采集及预处理方法,并对得到的被测物体表面三维数据点进行重构显示。
短句来源
    A measurement system that consists of LCD, CCD, and image card is designed, it can project and obtain grating image simultaneously.
    研制了由LCD投影仪、CCD摄像机、图象采集卡和工作台等组成的三维物体测量系统硬件装置,实现了用一台计算机同时控制投影和采集光栅图象,并建立了一套简单、快捷的系统调整方案。
短句来源
  raster images
    Research and Implementation of Converting Raster Images into PDF Files
    将光栅图象转换成PDF文件的研究与实现
短句来源
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  grating image
Structure of an anisotropic holographic diffraction grating image
      
When a sinusoidal amplitude grating is projected on an object, the surface-height distribution of the object is translated to a phase distribution of the deformed grating image.
      
Further defocus may result in spurious resolution, indicated by a phase reversal in a sine wave grating image.
      
Rather, we collect sample responses from natural images, and mix them with sample responses from the sinusoidal grating image.
      


The influences of various factors of dielectric target in certain pick-up tubes, storage devices and electro-optic display devices on the resolution are studied in this paper. By considering the general case of anisotropic dielectric target, the optical transfer function (OTF) from surface charge raster pattern to potential or optical pattern of dielectric target is deduced. The resolution limit of the dielectric target is analyzed quantitatively. The leakage of electricity on surface and the influence of the...

The influences of various factors of dielectric target in certain pick-up tubes, storage devices and electro-optic display devices on the resolution are studied in this paper. By considering the general case of anisotropic dielectric target, the optical transfer function (OTF) from surface charge raster pattern to potential or optical pattern of dielectric target is deduced. The resolution limit of the dielectric target is analyzed quantitatively. The leakage of electricity on surface and the influence of the other medium film layer introduced on target surface on the resolution are discussed in detail. For example, the MTF curves of silicon target in pick-up tubes, polystyrene target in video tape and anisotropic medium target of DKDP crystal in large screen projection TV are calculated by TQ-16 type computer, then the resolutions of these targets are found accordingly. The results obtained well coincide with the experimental curves and data in literatures. Finally, the calculation results are further confirmed by experiments on DKDP crvstal.

本文研究了在某些摄象器件、存贮器件或电光显示器件中介质靶诸因素对分辨率的影响。在考虑各向异性介质靶的普遍情况下,推导了由表面电荷光栅图象到电位图象或光象的介质靶的光学传递函数。定量地分析了它的分辨率极限;较详细地讨论了表面漏电和靶而其他介质膜层的引入对分辨率的影响。作为例子,利用TQ-16型计算机计算了摄象管中的硅靶、录象磁带中的聚苯乙烯靶和大屏幕投影电视中的DKDP晶体各向异性介质靶的MTF曲线,从而求得了它们的分辨率,所得结果与国外资料报道的实验曲线和数据很好地吻合。最后,用DKDP晶体所做的实验进一步证实了计算的结果。

Single unit activities were recorded with tungsten-in-glass electrodes fromarea 17 and 18 of anaesthetized, paralyzed cat. The orientation preferences ofcortical cells were tested with an alternating square-wave grating. A systematicrelationship between the preferred orientation and receptive field location in theretina was observed. Cortical cells tended to have their orientation perpendicularto the line connecting the area centrilis and their receptive fields, especially forthe cells in area 18. This relationship...

Single unit activities were recorded with tungsten-in-glass electrodes fromarea 17 and 18 of anaesthetized, paralyzed cat. The orientation preferences ofcortical cells were tested with an alternating square-wave grating. A systematicrelationship between the preferred orientation and receptive field location in theretina was observed. Cortical cells tended to have their orientation perpendicularto the line connecting the area centrilis and their receptive fields, especially forthe cells in area 18. This relationship was only shown for cells with an eccentricitiesof more than 9 degrees or cells having the narrowest receptive fields, and was signi-ficant for cells in a region along the vertical meridian, but not the diagonal meridian.

用金属微电极记录了114个猫皮层17、18区细胞对不同方位光栅图象刺激的反应。细胞最优方位与其感受野中心在视网膜的位置间有系统性关系,即最优方位总是倾向于垂直于各感受野中心与视网膜中心区(area centralis)的连线。这一规律对在18区或17、18区全体记录到的细胞而言,有统计意义。 在17、18区内,仅对于感受野位于视网膜离心度(eccentricity)大于9°视角的细胞、具有较窄感受野(宽度小于2.5°)的细胞以及感受野处于视网膜垂直经线附近的细胞,上述规律才有统计意义,而对感受野离心度小于9°的细胞、感受野宽度大于2.5°的细胞以及感受野在倾斜经线附近的细胞,上述规律不明显。

The principle, technological requirement and manufacturing technology of holographic gratings are discribed.The new development of flat field holographic gratings, monographs holographic gratings, toroidal holographic gratings, laser holographic gratings and blazed (holographic gratings are discussed. In order to further developments of holographic gratings some suggestions are also given.

本文叙述了全息光栅的制造原理、工艺要求和制造技术。介绍了平场全息光栅、图象全息光栅、超环面全息光栅、激光全患光栅和闪耀全息光栅的新进展。最后,作者提出进一步发展全息光栅的若干建议。

 
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