| 摘要 |
PURPOSE:To improve the quality, by interposing a doughnut-shaped elastic material between an imege pickup tube and coil parts and connecting and fixing them with a high coaxial degree. CONSTITUTION:When the inside diameter of the aperture part of a bobbin 4 is denoted as phiC and the outside diameter of a glass valve of an image pickup tube 1 is denoted as phiT, a doughnut-shaped elastic material 10 has >=phiC outside diameter and <=phiT inside diameter. Therefore, the elastic material 10 is fixed between a ring electrode 2 and a position setting part 11 of the bobbin 4. The elastic material 10 is compressed in the diameter direction by relations of inside and outside diameters, and the axis of coil parts 3 and that of the image pickup tube 1 coincide with each other accurately, and the front end part of the image pickup tube is fixed to parts 3 by the elastic material 10. When parts 3 and the image pickup tube 1 are fixed in this state in a rear end part 7 of the bobbin 4 by a clamping band, axes of them coincide with each other in the rear end part, and thus, a space length DELTAS between them is constant in any position. |
