弥散斑 meaning in English

disc of confusion

From the results of these experiments , we know that the improvement effect is clear when the enhancement ratio is 1 . 5 . but the enhancement ratio of 2 . 5 is difficult to be reached because of the optical dispersion . it shows that the enhancement ratio is limited by the size of ccd sensor ' s cell and optical dispersion
而由于ccd像元尺寸与弥散斑相差不多，要想获得分辨率提高2 . 5倍的高分辨率图已经很困难，说明反演解析法实际上对分辨率的提高是有一个上限的，这和弥散斑与ccd感光像元间的大小比例有关。
Single mode optical fiber laser confocal scanning microscopy is a new technology in microstructure studying . the speciality of the system is limiting the out - of - focus light reflected from out - of - focus plane in object to restrict the blur of image . therefore , the plane resolution and axial resolution of the system could be improved to sub - micron grade
单模光纤激光共焦扫描显微成像系统是研究微观结构的一种新技术，其本质是抑制目标物体离焦面所反射的光线进入系统，从而抑制这些离焦光线造成像点弥散斑增大的影响，使系统的横向与轴向分辨率得到大幅度的提高，能实现亚微米级的层析。