This must be filled with liquid nitrogen before the microscope is used. Objective aperture is used to enhance contrast. Holey grid is a TEM grid support coated with a thin plastic film and a stabilizing carbon layer. Fresnel fringes result when diffraction occurs with the electromagnetic radiations and an unclear image of the irradiated object is formed. The edge appears to have bands or fringes.
Intermediate lens magnifies the image coming from the objective lens.
Projector lens further magnifies the image coming from the intermediate lens and projects it on to the phosphorescent screen. C. Recording the Image Phosphorescent screen - The final image is viewed by projection onto this screen which gives off photons when irradiated by the electron beam. Film Camera is located beneath the phosphorescent screen. The screen is raised in order to expose the photographic film. CCD - Computer digitizing and archiving.