In an image converter (Figure 1) an image of an object is projected by an objective onto a photocathode (with X rays the shadow image is projected directly onto the photocathode). ![]() Its operation is based on the conversion of an optical or X-ray image into an electron image by means of a photocathode, with the subsequent conversion of the electron image into a visible image, which is produced on a fluorescent screen ( see CATHODE LUMINESCENCE and PHOSPHORS). A phototube for the conversion of an infrared, ultraviolet, or X-ray image of an object, which is invisible to the eye, into a visible image it may also serve to increase (intensify) the brightness of a visible image (image intensifier).
0 Comments
Leave a Reply. |