If the objective lens is further away from the compact disk than the focal length of the object lens , then the cylindrical lens again creates an elliptical image on the photodetector array 如果物镜与光盘之间的距离长于物镜的焦距,柱面透镜也会使在光电探测器阵列上的成像变成椭圆影像。
We discuss a low cost fabrication method of a diffractive microlens with high performance for both blue and red dvd objective lenses , which consists of single - step photolithography and a wet etching process 摘要采用单步光刻和湿法腐蚀工艺,低成本快速制作面向高性能蓝光和红光dvd光学头物镜的衍射微透镜。
We want to unfold the foils so that we can examine and image the tiles using transmitted illumination ( light from below the tile ) rather than reflected illumination ( light through the microscope objective lens ) 我们打算打开衬板这样就能用透射光(光线从凝胶块下面照过来)而不是反射光(光线从显微镜物镜处照过去)照明来对凝胶块进行检查、拍照。
The specimen is mounted in a special holder which fits into the bore of the objective lens and enables the specimen to be tilted through angles greater than 30 about two orthogonal axes so that appropriate crystallographic analyses can be carried out 样本被架在特殊的支架上,支架被放置在目标透镜的圆孔中,使得标本倾斜的角度能够超过30穿过两个正交的角,然后适用的晶体学分析再展开。
Electrons which pass through the thin specimen are brought to a focus in the back focal plane of the objective lens , this lens , like all electromagnetic lenses , acts as a converging lens and thus forms a diffraction pattern in this b . f . plane 穿越薄样本的电子被带到目标透镜背面焦点平面的一个焦点,这个透镜,象所有的电子透镜一样,充当了聚焦透镜的作用,因此,构造了在这个背面焦点平面的衍射模式。
This is achieved experimentally by focusing the selector aperture on the final screen using the diffraction lens , which is most accurately done after removing the objective aperture , and then ( after replacing the objective aperture ) focusing the specimen using the objective lens only 这已经通过使用衍射透镜在最终屏幕上聚焦选择孔实验性的完成,此方法多数能在移动目标孔后准确完成,然后(重置目标孔后)仅通过目标透镜聚焦样本。
Whether the 180 inversion appears in the relation between the electron - optical image , i . e . the micrograph , and diffraction pattern seen on the final screen , depends on the number of inversions that the image and diffraction pattern undergo by the lenses following the objective lens in the microscope column 电子光学映像比如显微图和最终屏幕所见衍射模型之间180度倒置的出现是否有联系,取决于显微镜柱中目标通过透镜产生的映像的倒置数量。
It was based on the principle of laser confocal microscope . and the two - dimensional scanning configuration was adopted by the optical scanner and the telecentric linear imaging objective lens of large numerical aperture to realize x - direction ' s scanning , and the conventional mechanical method using linear driver and linear guide track to y - direction ' s . the experiment results indicate that the device can run smoothly and rapidly , be operated easily and detect fluorescence effectively 仪器基于激光共焦显微镜的理论,采用振镜和远心线性成像物镜实现x向扫描;精密导轨和步进电机实现y向扫描的检测仪,经验证,扫描仪具有快速、操作简单、检测芯片能力良好等特征,有望弥补市场的空缺。