Design and Operational Parameters of Image Orthicon Tubes 41/2Inch and 3 Inch Field Mesh Types

Although the 5820 Image Orthicon received universal acceptance in the United States of America as the camera tube for studio and remote telecasts, its progress in Europe was impeded due to the existance of other picture originaing equipment which produced pictures superior in all respects other than sensitivity. As a result, considerable modification of the image orthicon tube was undertaken, culminating in the develoment of the 3 inch field mesh and 41/2 inch image orthicon tubes.